| Message ID | 20190220053040.10831-4-ira.weiny@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add FOLL_LONGTERM to GUP fast and use it | expand |
Hi Ira Martin and I looked at your patch and agree that it doesn't change functionality for Orangefs. Reviewed-by: Mike Marshall <hubcap@omnibond.com> On Wed, Feb 20, 2019 at 12:32 AM <ira.weiny@intel.com> wrote: > > From: Ira Weiny <ira.weiny@intel.com> > > To facilitate additional options to get_user_pages_fast() change the > singular write parameter to be gup_flags. > > This patch does not change any functionality. New functionality will > follow in subsequent patches. > > Some of the get_user_pages_fast() call sites were unchanged because they > already passed FOLL_WRITE or 0 for the write parameter. > > Signed-off-by: Ira Weiny <ira.weiny@intel.com> > --- > arch/mips/mm/gup.c | 11 ++++++----- > arch/powerpc/kvm/book3s_64_mmu_hv.c | 4 ++-- > arch/powerpc/kvm/e500_mmu.c | 2 +- > arch/powerpc/mm/mmu_context_iommu.c | 4 ++-- > arch/s390/kvm/interrupt.c | 2 +- > arch/s390/mm/gup.c | 12 ++++++------ > arch/sh/mm/gup.c | 11 ++++++----- > arch/sparc/mm/gup.c | 9 +++++---- > arch/x86/kvm/paging_tmpl.h | 2 +- > arch/x86/kvm/svm.c | 2 +- > drivers/fpga/dfl-afu-dma-region.c | 2 +- > drivers/gpu/drm/via/via_dmablit.c | 3 ++- > drivers/infiniband/hw/hfi1/user_pages.c | 3 ++- > drivers/misc/genwqe/card_utils.c | 2 +- > drivers/misc/vmw_vmci/vmci_host.c | 2 +- > drivers/misc/vmw_vmci/vmci_queue_pair.c | 6 ++++-- > drivers/platform/goldfish/goldfish_pipe.c | 3 ++- > drivers/rapidio/devices/rio_mport_cdev.c | 4 +++- > drivers/sbus/char/oradax.c | 2 +- > drivers/scsi/st.c | 3 ++- > drivers/staging/gasket/gasket_page_table.c | 4 ++-- > drivers/tee/tee_shm.c | 2 +- > drivers/vfio/vfio_iommu_spapr_tce.c | 3 ++- > drivers/vhost/vhost.c | 2 +- > drivers/video/fbdev/pvr2fb.c | 2 +- > drivers/virt/fsl_hypervisor.c | 2 +- > drivers/xen/gntdev.c | 2 +- > fs/orangefs/orangefs-bufmap.c | 2 +- > include/linux/mm.h | 4 ++-- > kernel/futex.c | 2 +- > lib/iov_iter.c | 7 +++++-- > mm/gup.c | 10 +++++----- > mm/util.c | 8 ++++---- > net/ceph/pagevec.c | 2 +- > net/rds/info.c | 2 +- > net/rds/rdma.c | 3 ++- > 36 files changed, 81 insertions(+), 65 deletions(-) > > diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c > index 0d14e0d8eacf..4c2b4483683c 100644 > --- a/arch/mips/mm/gup.c > +++ b/arch/mips/mm/gup.c > @@ -235,7 +235,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -247,8 +247,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * requested. If nr_pages is 0 or negative, returns 0. If no pages > * were pinned, returns -errno. > */ > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > struct mm_struct *mm = current->mm; > unsigned long addr, len, end; > @@ -273,7 +273,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > next = pgd_addr_end(addr, end); > if (pgd_none(pgd)) > goto slow; > - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) > + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, > + pages, &nr)) > goto slow; > } while (pgdp++, addr = next, addr != end); > local_irq_enable(); > @@ -289,7 +290,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > pages += nr; > > ret = get_user_pages_unlocked(start, (end - start) >> PAGE_SHIFT, > - pages, write ? FOLL_WRITE : 0); > + pages, gup_flags); > > /* Have to be a bit careful with return values */ > if (nr > 0) { > diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c > index bd2dcfbf00cd..8fcb0a921e46 100644 > --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c > +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c > @@ -582,7 +582,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, > /* If writing != 0, then the HPTE must allow writing, if we get here */ > write_ok = writing; > hva = gfn_to_hva_memslot(memslot, gfn); > - npages = get_user_pages_fast(hva, 1, writing, pages); > + npages = get_user_pages_fast(hva, 1, writing ? FOLL_WRITE : 0, pages); > if (npages < 1) { > /* Check if it's an I/O mapping */ > down_read(¤t->mm->mmap_sem); > @@ -1175,7 +1175,7 @@ void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa, > if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) > goto err; > hva = gfn_to_hva_memslot(memslot, gfn); > - npages = get_user_pages_fast(hva, 1, 1, pages); > + npages = get_user_pages_fast(hva, 1, FOLL_WRITE, pages); > if (npages < 1) > goto err; > page = pages[0]; > diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c > index 24296f4cadc6..e0af53fd78c5 100644 > --- a/arch/powerpc/kvm/e500_mmu.c > +++ b/arch/powerpc/kvm/e500_mmu.c > @@ -783,7 +783,7 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, > if (!pages) > return -ENOMEM; > > - ret = get_user_pages_fast(cfg->array, num_pages, 1, pages); > + ret = get_user_pages_fast(cfg->array, num_pages, FOLL_WRITE, pages); > if (ret < 0) > goto free_pages; > > diff --git a/arch/powerpc/mm/mmu_context_iommu.c b/arch/powerpc/mm/mmu_context_iommu.c > index a712a650a8b6..acb0990c8364 100644 > --- a/arch/powerpc/mm/mmu_context_iommu.c > +++ b/arch/powerpc/mm/mmu_context_iommu.c > @@ -190,7 +190,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua, > for (i = 0; i < entries; ++i) { > cur_ua = ua + (i << PAGE_SHIFT); > if (1 != get_user_pages_fast(cur_ua, > - 1/* pages */, 1/* iswrite */, &page)) { > + 1/* pages */, FOLL_WRITE, &page)) { > ret = -EFAULT; > for (j = 0; j < i; ++j) > put_page(pfn_to_page(mem->hpas[j] >> > @@ -209,7 +209,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua, > if (mm_iommu_move_page_from_cma(page)) > goto populate; > if (1 != get_user_pages_fast(cur_ua, > - 1/* pages */, 1/* iswrite */, > + 1/* pages */, FOLL_WRITE, > &page)) { > ret = -EFAULT; > for (j = 0; j < i; ++j) > diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c > index fcb55b02990e..69d9366b966c 100644 > --- a/arch/s390/kvm/interrupt.c > +++ b/arch/s390/kvm/interrupt.c > @@ -2278,7 +2278,7 @@ static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) > ret = -EFAULT; > goto out; > } > - ret = get_user_pages_fast(map->addr, 1, 1, &map->page); > + ret = get_user_pages_fast(map->addr, 1, FOLL_WRITE, &map->page); > if (ret < 0) > goto out; > BUG_ON(ret != 1); > diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c > index 2809d11c7a28..0a6faf3d9960 100644 > --- a/arch/s390/mm/gup.c > +++ b/arch/s390/mm/gup.c > @@ -265,7 +265,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -277,22 +277,22 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * requested. If nr_pages is 0 or negative, returns 0. If no pages > * were pinned, returns -errno. > */ > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > int nr, ret; > > might_sleep(); > start &= PAGE_MASK; > - nr = __get_user_pages_fast(start, nr_pages, write, pages); > + nr = __get_user_pages_fast(start, nr_pages, gup_flags & FOLL_WRITE, > + pages); > if (nr == nr_pages) > return nr; > > /* Try to get the remaining pages with get_user_pages */ > start += nr << PAGE_SHIFT; > pages += nr; > - ret = get_user_pages_unlocked(start, nr_pages - nr, pages, > - write ? FOLL_WRITE : 0); > + ret = get_user_pages_unlocked(start, nr_pages - nr, pages, gup_flags); > /* Have to be a bit careful with return values */ > if (nr > 0) > ret = (ret < 0) ? nr : ret + nr; > diff --git a/arch/sh/mm/gup.c b/arch/sh/mm/gup.c > index 3e27f6d1f1ec..277c882f7489 100644 > --- a/arch/sh/mm/gup.c > +++ b/arch/sh/mm/gup.c > @@ -204,7 +204,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -216,8 +216,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * requested. If nr_pages is 0 or negative, returns 0. If no pages > * were pinned, returns -errno. > */ > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > struct mm_struct *mm = current->mm; > unsigned long addr, len, end; > @@ -241,7 +241,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > next = pgd_addr_end(addr, end); > if (pgd_none(pgd)) > goto slow; > - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) > + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, > + pages, &nr)) > goto slow; > } while (pgdp++, addr = next, addr != end); > local_irq_enable(); > @@ -261,7 +262,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > ret = get_user_pages_unlocked(start, > (end - start) >> PAGE_SHIFT, pages, > - write ? FOLL_WRITE : 0); > + gup_flags); > > /* Have to be a bit careful with return values */ > if (nr > 0) { > diff --git a/arch/sparc/mm/gup.c b/arch/sparc/mm/gup.c > index aee6dba83d0e..1e770a517d4a 100644 > --- a/arch/sparc/mm/gup.c > +++ b/arch/sparc/mm/gup.c > @@ -245,8 +245,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > return nr; > } > > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > struct mm_struct *mm = current->mm; > unsigned long addr, len, end; > @@ -303,7 +303,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > next = pgd_addr_end(addr, end); > if (pgd_none(pgd)) > goto slow; > - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) > + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, > + pages, &nr)) > goto slow; > } while (pgdp++, addr = next, addr != end); > > @@ -324,7 +325,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > ret = get_user_pages_unlocked(start, > (end - start) >> PAGE_SHIFT, pages, > - write ? FOLL_WRITE : 0); > + gup_flags); > > /* Have to be a bit careful with return values */ > if (nr > 0) { > diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h > index 6bdca39829bc..08715034e315 100644 > --- a/arch/x86/kvm/paging_tmpl.h > +++ b/arch/x86/kvm/paging_tmpl.h > @@ -140,7 +140,7 @@ static int FNAME(cmpxchg_gpte)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, > pt_element_t *table; > struct page *page; > > - npages = get_user_pages_fast((unsigned long)ptep_user, 1, 1, &page); > + npages = get_user_pages_fast((unsigned long)ptep_user, 1, FOLL_WRITE, &page); > /* Check if the user is doing something meaningless. */ > if (unlikely(npages != 1)) > return -EFAULT; > diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c > index f13a3a24d360..173596a020cb 100644 > --- a/arch/x86/kvm/svm.c > +++ b/arch/x86/kvm/svm.c > @@ -1803,7 +1803,7 @@ static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr, > return NULL; > > /* Pin the user virtual address. */ > - npinned = get_user_pages_fast(uaddr, npages, write ? FOLL_WRITE : 0, pages); > + npinned = get_user_pages_fast(uaddr, npages, FOLL_WRITE, pages); > if (npinned != npages) { > pr_err("SEV: Failure locking %lu pages.\n", npages); > goto err; > diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-region.c > index e18a786fc943..c438722bf4e1 100644 > --- a/drivers/fpga/dfl-afu-dma-region.c > +++ b/drivers/fpga/dfl-afu-dma-region.c > @@ -102,7 +102,7 @@ static int afu_dma_pin_pages(struct dfl_feature_platform_data *pdata, > goto unlock_vm; > } > > - pinned = get_user_pages_fast(region->user_addr, npages, 1, > + pinned = get_user_pages_fast(region->user_addr, npages, FOLL_WRITE, > region->pages); > if (pinned < 0) { > ret = pinned; > diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dmablit.c > index 345bda4494e1..0c8b09602910 100644 > --- a/drivers/gpu/drm/via/via_dmablit.c > +++ b/drivers/gpu/drm/via/via_dmablit.c > @@ -239,7 +239,8 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer) > if (NULL == vsg->pages) > return -ENOMEM; > ret = get_user_pages_fast((unsigned long)xfer->mem_addr, > - vsg->num_pages, vsg->direction == DMA_FROM_DEVICE, > + vsg->num_pages, > + vsg->direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0, > vsg->pages); > if (ret != vsg->num_pages) { > if (ret < 0) > diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c > index 24b592c6522e..78ccacaf97d0 100644 > --- a/drivers/infiniband/hw/hfi1/user_pages.c > +++ b/drivers/infiniband/hw/hfi1/user_pages.c > @@ -105,7 +105,8 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np > { > int ret; > > - ret = get_user_pages_fast(vaddr, npages, writable, pages); > + ret = get_user_pages_fast(vaddr, npages, writable ? FOLL_WRITE : 0, > + pages); > if (ret < 0) > return ret; > > diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c > index 25265fd0fd6e..89cff9d1012b 100644 > --- a/drivers/misc/genwqe/card_utils.c > +++ b/drivers/misc/genwqe/card_utils.c > @@ -603,7 +603,7 @@ int genwqe_user_vmap(struct genwqe_dev *cd, struct dma_mapping *m, void *uaddr, > /* pin user pages in memory */ > rc = get_user_pages_fast(data & PAGE_MASK, /* page aligned addr */ > m->nr_pages, > - m->write, /* readable/writable */ > + m->write ? FOLL_WRITE : 0, /* readable/writable */ > m->page_list); /* ptrs to pages */ > if (rc < 0) > goto fail_get_user_pages; > diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c > index 997f92543dd4..422d08da3244 100644 > --- a/drivers/misc/vmw_vmci/vmci_host.c > +++ b/drivers/misc/vmw_vmci/vmci_host.c > @@ -242,7 +242,7 @@ static int vmci_host_setup_notify(struct vmci_ctx *context, > /* > * Lock physical page backing a given user VA. > */ > - retval = get_user_pages_fast(uva, 1, 1, &context->notify_page); > + retval = get_user_pages_fast(uva, 1, FOLL_WRITE, &context->notify_page); > if (retval != 1) { > context->notify_page = NULL; > return VMCI_ERROR_GENERIC; > diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c > index 264f4ed8eef2..c5396ee32e51 100644 > --- a/drivers/misc/vmw_vmci/vmci_queue_pair.c > +++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c > @@ -666,7 +666,8 @@ static int qp_host_get_user_memory(u64 produce_uva, > int err = VMCI_SUCCESS; > > retval = get_user_pages_fast((uintptr_t) produce_uva, > - produce_q->kernel_if->num_pages, 1, > + produce_q->kernel_if->num_pages, > + FOLL_WRITE, > produce_q->kernel_if->u.h.header_page); > if (retval < (int)produce_q->kernel_if->num_pages) { > pr_debug("get_user_pages_fast(produce) failed (retval=%d)", > @@ -678,7 +679,8 @@ static int qp_host_get_user_memory(u64 produce_uva, > } > > retval = get_user_pages_fast((uintptr_t) consume_uva, > - consume_q->kernel_if->num_pages, 1, > + consume_q->kernel_if->num_pages, > + FOLL_WRITE, > consume_q->kernel_if->u.h.header_page); > if (retval < (int)consume_q->kernel_if->num_pages) { > pr_debug("get_user_pages_fast(consume) failed (retval=%d)", > diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c > index 321bc673c417..cef0133aa47a 100644 > --- a/drivers/platform/goldfish/goldfish_pipe.c > +++ b/drivers/platform/goldfish/goldfish_pipe.c > @@ -274,7 +274,8 @@ static int pin_user_pages(unsigned long first_page, > *iter_last_page_size = last_page_size; > } > > - ret = get_user_pages_fast(first_page, requested_pages, !is_write, > + ret = get_user_pages_fast(first_page, requested_pages, > + !is_write ? FOLL_WRITE : 0, > pages); > if (ret <= 0) > return -EFAULT; > diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c > index cbe467ff1aba..f681b3e9e970 100644 > --- a/drivers/rapidio/devices/rio_mport_cdev.c > +++ b/drivers/rapidio/devices/rio_mport_cdev.c > @@ -868,7 +868,9 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode, > > pinned = get_user_pages_fast( > (unsigned long)xfer->loc_addr & PAGE_MASK, > - nr_pages, dir == DMA_FROM_DEVICE, page_list); > + nr_pages, > + dir == DMA_FROM_DEVICE ? FOLL_WRITE : 0, > + page_list); > > if (pinned != nr_pages) { > if (pinned < 0) { > diff --git a/drivers/sbus/char/oradax.c b/drivers/sbus/char/oradax.c > index 6516bc3cb58b..790aa148670d 100644 > --- a/drivers/sbus/char/oradax.c > +++ b/drivers/sbus/char/oradax.c > @@ -437,7 +437,7 @@ static int dax_lock_page(void *va, struct page **p) > > dax_dbg("uva %p", va); > > - ret = get_user_pages_fast((unsigned long)va, 1, 1, p); > + ret = get_user_pages_fast((unsigned long)va, 1, FOLL_WRITE, p); > if (ret == 1) { > dax_dbg("locked page %p, for VA %p", *p, va); > return 0; > diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c > index 7ff22d3f03e3..871b25914c07 100644 > --- a/drivers/scsi/st.c > +++ b/drivers/scsi/st.c > @@ -4918,7 +4918,8 @@ static int sgl_map_user_pages(struct st_buffer *STbp, > > /* Try to fault in all of the necessary pages */ > /* rw==READ means read from drive, write into memory area */ > - res = get_user_pages_fast(uaddr, nr_pages, rw == READ, pages); > + res = get_user_pages_fast(uaddr, nr_pages, rw == READ ? FOLL_WRITE : 0, > + pages); > > /* Errors and no page mapped should return here */ > if (res < nr_pages) > diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c > index 26755d9ca41d..f67fdf1d3817 100644 > --- a/drivers/staging/gasket/gasket_page_table.c > +++ b/drivers/staging/gasket/gasket_page_table.c > @@ -486,8 +486,8 @@ static int gasket_perform_mapping(struct gasket_page_table *pg_tbl, > ptes[i].dma_addr = pg_tbl->coherent_pages[0].paddr + > off + i * PAGE_SIZE; > } else { > - ret = get_user_pages_fast(page_addr - offset, 1, 1, > - &page); > + ret = get_user_pages_fast(page_addr - offset, 1, > + FOLL_WRITE, &page); > > if (ret <= 0) { > dev_err(pg_tbl->device, > diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c > index 0b9ab1d0dd45..49fd7312e2aa 100644 > --- a/drivers/tee/tee_shm.c > +++ b/drivers/tee/tee_shm.c > @@ -273,7 +273,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, > goto err; > } > > - rc = get_user_pages_fast(start, num_pages, 1, shm->pages); > + rc = get_user_pages_fast(start, num_pages, FOLL_WRITE, shm->pages); > if (rc > 0) > shm->num_pages = rc; > if (rc != num_pages) { > diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c > index c424913324e3..a4b10bb4086b 100644 > --- a/drivers/vfio/vfio_iommu_spapr_tce.c > +++ b/drivers/vfio/vfio_iommu_spapr_tce.c > @@ -532,7 +532,8 @@ static int tce_iommu_use_page(unsigned long tce, unsigned long *hpa) > enum dma_data_direction direction = iommu_tce_direction(tce); > > if (get_user_pages_fast(tce & PAGE_MASK, 1, > - direction != DMA_TO_DEVICE, &page) != 1) > + direction != DMA_TO_DEVICE ? FOLL_WRITE : 0, > + &page) != 1) > return -EFAULT; > > *hpa = __pa((unsigned long) page_address(page)); > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index 24a129fcdd61..72685b1659ff 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -1700,7 +1700,7 @@ static int set_bit_to_user(int nr, void __user *addr) > int bit = nr + (log % PAGE_SIZE) * 8; > int r; > > - r = get_user_pages_fast(log, 1, 1, &page); > + r = get_user_pages_fast(log, 1, FOLL_WRITE, &page); > if (r < 0) > return r; > BUG_ON(r != 1); > diff --git a/drivers/video/fbdev/pvr2fb.c b/drivers/video/fbdev/pvr2fb.c > index 8a53d1de611d..41390c8e0f67 100644 > --- a/drivers/video/fbdev/pvr2fb.c > +++ b/drivers/video/fbdev/pvr2fb.c > @@ -686,7 +686,7 @@ static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, > if (!pages) > return -ENOMEM; > > - ret = get_user_pages_fast((unsigned long)buf, nr_pages, true, pages); > + ret = get_user_pages_fast((unsigned long)buf, nr_pages, FOLL_WRITE, pages); > if (ret < nr_pages) { > nr_pages = ret; > ret = -EINVAL; > diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c > index 8ba726e600e9..6446bcab4185 100644 > --- a/drivers/virt/fsl_hypervisor.c > +++ b/drivers/virt/fsl_hypervisor.c > @@ -244,7 +244,7 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) > > /* Get the physical addresses of the source buffer */ > num_pinned = get_user_pages_fast(param.local_vaddr - lb_offset, > - num_pages, param.source != -1, pages); > + num_pages, param.source != -1 ? FOLL_WRITE : 0, pages); > > if (num_pinned != num_pages) { > /* get_user_pages() failed */ > diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c > index 5efc5eee9544..7b47f1e6aab4 100644 > --- a/drivers/xen/gntdev.c > +++ b/drivers/xen/gntdev.c > @@ -852,7 +852,7 @@ static int gntdev_get_page(struct gntdev_copy_batch *batch, void __user *virt, > unsigned long xen_pfn; > int ret; > > - ret = get_user_pages_fast(addr, 1, writeable, &page); > + ret = get_user_pages_fast(addr, 1, writeable ? FOLL_WRITE : 0, &page); > if (ret < 0) > return ret; > > diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c > index 443bcd8c3c19..5a7c4fda682f 100644 > --- a/fs/orangefs/orangefs-bufmap.c > +++ b/fs/orangefs/orangefs-bufmap.c > @@ -269,7 +269,7 @@ orangefs_bufmap_map(struct orangefs_bufmap *bufmap, > > /* map the pages */ > ret = get_user_pages_fast((unsigned long)user_desc->ptr, > - bufmap->page_count, 1, bufmap->page_array); > + bufmap->page_count, FOLL_WRITE, bufmap->page_array); > > if (ret < 0) > return ret; > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 05a105d9d4c3..8e1f3cd7482a 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -1537,8 +1537,8 @@ long get_user_pages_locked(unsigned long start, unsigned long nr_pages, > long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages, > struct page **pages, unsigned int gup_flags); > > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages); > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages); > > /* Container for pinned pfns / pages */ > struct frame_vector { > diff --git a/kernel/futex.c b/kernel/futex.c > index fdd312da0992..e10209946f8b 100644 > --- a/kernel/futex.c > +++ b/kernel/futex.c > @@ -546,7 +546,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a > if (unlikely(should_fail_futex(fshared))) > return -EFAULT; > > - err = get_user_pages_fast(address, 1, 1, &page); > + err = get_user_pages_fast(address, 1, FOLL_WRITE, &page); > /* > * If write access is not required (eg. FUTEX_WAIT), try > * and get read-only access. > diff --git a/lib/iov_iter.c b/lib/iov_iter.c > index be4bd627caf0..6dbae0692719 100644 > --- a/lib/iov_iter.c > +++ b/lib/iov_iter.c > @@ -1280,7 +1280,9 @@ ssize_t iov_iter_get_pages(struct iov_iter *i, > len = maxpages * PAGE_SIZE; > addr &= ~(PAGE_SIZE - 1); > n = DIV_ROUND_UP(len, PAGE_SIZE); > - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, pages); > + res = get_user_pages_fast(addr, n, > + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, > + pages); > if (unlikely(res < 0)) > return res; > return (res == n ? len : res * PAGE_SIZE) - *start; > @@ -1361,7 +1363,8 @@ ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, > p = get_pages_array(n); > if (!p) > return -ENOMEM; > - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, p); > + res = get_user_pages_fast(addr, n, > + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, p); > if (unlikely(res < 0)) { > kvfree(p); > return res; > diff --git a/mm/gup.c b/mm/gup.c > index 681388236106..6f32d36b3c5b 100644 > --- a/mm/gup.c > +++ b/mm/gup.c > @@ -1863,7 +1863,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -1875,8 +1875,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * requested. If nr_pages is 0 or negative, returns 0. If no pages > * were pinned, returns -errno. > */ > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > unsigned long addr, len, end; > int nr = 0, ret = 0; > @@ -1894,7 +1894,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > if (gup_fast_permitted(start, nr_pages)) { > local_irq_disable(); > - gup_pgd_range(addr, end, write ? FOLL_WRITE : 0, pages, &nr); > + gup_pgd_range(addr, end, gup_flags, pages, &nr); > local_irq_enable(); > ret = nr; > } > @@ -1905,7 +1905,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > pages += nr; > > ret = get_user_pages_unlocked(start, nr_pages - nr, pages, > - write ? FOLL_WRITE : 0); > + gup_flags); > > /* Have to be a bit careful with return values */ > if (nr > 0) { > diff --git a/mm/util.c b/mm/util.c > index 1ea055138043..01ffe145c62b 100644 > --- a/mm/util.c > +++ b/mm/util.c > @@ -306,7 +306,7 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -327,10 +327,10 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); > * get_user_pages_fast simply falls back to get_user_pages. > */ > int __weak get_user_pages_fast(unsigned long start, > - int nr_pages, int write, struct page **pages) > + int nr_pages, unsigned int gup_flags, > + struct page **pages) > { > - return get_user_pages_unlocked(start, nr_pages, pages, > - write ? FOLL_WRITE : 0); > + return get_user_pages_unlocked(start, nr_pages, pages, gup_flags); > } > EXPORT_SYMBOL_GPL(get_user_pages_fast); > > diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c > index d3736f5bffec..74cafc0142ea 100644 > --- a/net/ceph/pagevec.c > +++ b/net/ceph/pagevec.c > @@ -27,7 +27,7 @@ struct page **ceph_get_direct_page_vector(const void __user *data, > while (got < num_pages) { > rc = get_user_pages_fast( > (unsigned long)data + ((unsigned long)got * PAGE_SIZE), > - num_pages - got, write_page, pages + got); > + num_pages - got, write_page ? FOLL_WRITE : 0, pages + got); > if (rc < 0) > break; > BUG_ON(rc == 0); > diff --git a/net/rds/info.c b/net/rds/info.c > index e367a97a18c8..03f6fd56d237 100644 > --- a/net/rds/info.c > +++ b/net/rds/info.c > @@ -193,7 +193,7 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval, > ret = -ENOMEM; > goto out; > } > - ret = get_user_pages_fast(start, nr_pages, 1, pages); > + ret = get_user_pages_fast(start, nr_pages, FOLL_WRITE, pages); > if (ret != nr_pages) { > if (ret > 0) > nr_pages = ret; > diff --git a/net/rds/rdma.c b/net/rds/rdma.c > index 182ab8430594..b340ed4fc43a 100644 > --- a/net/rds/rdma.c > +++ b/net/rds/rdma.c > @@ -158,7 +158,8 @@ static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages, > { > int ret; > > - ret = get_user_pages_fast(user_addr, nr_pages, write, pages); > + ret = get_user_pages_fast(user_addr, nr_pages, write ? FOLL_WRITE : 0, > + pages); > > if (ret >= 0 && ret < nr_pages) { > while (ret--) > -- > 2.20.1 > >
Hi Ira, On Wed, Feb 20, 2019 at 11:01 AM <ira.weiny@intel.com> wrote: > > From: Ira Weiny <ira.weiny@intel.com> > > To facilitate additional options to get_user_pages_fast() change the > singular write parameter to be gup_flags. > > This patch does not change any functionality. New functionality will > follow in subsequent patches. > > Some of the get_user_pages_fast() call sites were unchanged because they > already passed FOLL_WRITE or 0 for the write parameter. > > Signed-off-by: Ira Weiny <ira.weiny@intel.com> > --- > arch/mips/mm/gup.c | 11 ++++++----- > arch/powerpc/kvm/book3s_64_mmu_hv.c | 4 ++-- > arch/powerpc/kvm/e500_mmu.c | 2 +- > arch/powerpc/mm/mmu_context_iommu.c | 4 ++-- > arch/s390/kvm/interrupt.c | 2 +- > arch/s390/mm/gup.c | 12 ++++++------ > arch/sh/mm/gup.c | 11 ++++++----- > arch/sparc/mm/gup.c | 9 +++++---- > arch/x86/kvm/paging_tmpl.h | 2 +- > arch/x86/kvm/svm.c | 2 +- > drivers/fpga/dfl-afu-dma-region.c | 2 +- > drivers/gpu/drm/via/via_dmablit.c | 3 ++- > drivers/infiniband/hw/hfi1/user_pages.c | 3 ++- > drivers/misc/genwqe/card_utils.c | 2 +- > drivers/misc/vmw_vmci/vmci_host.c | 2 +- > drivers/misc/vmw_vmci/vmci_queue_pair.c | 6 ++++-- > drivers/platform/goldfish/goldfish_pipe.c | 3 ++- > drivers/rapidio/devices/rio_mport_cdev.c | 4 +++- > drivers/sbus/char/oradax.c | 2 +- > drivers/scsi/st.c | 3 ++- > drivers/staging/gasket/gasket_page_table.c | 4 ++-- > drivers/tee/tee_shm.c | 2 +- > drivers/vfio/vfio_iommu_spapr_tce.c | 3 ++- > drivers/vhost/vhost.c | 2 +- > drivers/video/fbdev/pvr2fb.c | 2 +- > drivers/virt/fsl_hypervisor.c | 2 +- > drivers/xen/gntdev.c | 2 +- > fs/orangefs/orangefs-bufmap.c | 2 +- > include/linux/mm.h | 4 ++-- > kernel/futex.c | 2 +- > lib/iov_iter.c | 7 +++++-- > mm/gup.c | 10 +++++----- > mm/util.c | 8 ++++---- > net/ceph/pagevec.c | 2 +- > net/rds/info.c | 2 +- > net/rds/rdma.c | 3 ++- > 36 files changed, 81 insertions(+), 65 deletions(-) > > diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c > index 0d14e0d8eacf..4c2b4483683c 100644 > --- a/arch/mips/mm/gup.c > +++ b/arch/mips/mm/gup.c > @@ -235,7 +235,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -247,8 +247,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * requested. If nr_pages is 0 or negative, returns 0. If no pages > * were pinned, returns -errno. > */ > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > struct mm_struct *mm = current->mm; > unsigned long addr, len, end; > @@ -273,7 +273,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > next = pgd_addr_end(addr, end); > if (pgd_none(pgd)) > goto slow; > - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) > + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, > + pages, &nr)) > goto slow; > } while (pgdp++, addr = next, addr != end); > local_irq_enable(); > @@ -289,7 +290,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > pages += nr; > > ret = get_user_pages_unlocked(start, (end - start) >> PAGE_SHIFT, > - pages, write ? FOLL_WRITE : 0); > + pages, gup_flags); > > /* Have to be a bit careful with return values */ > if (nr > 0) { > diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c > index bd2dcfbf00cd..8fcb0a921e46 100644 > --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c > +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c > @@ -582,7 +582,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, > /* If writing != 0, then the HPTE must allow writing, if we get here */ > write_ok = writing; > hva = gfn_to_hva_memslot(memslot, gfn); > - npages = get_user_pages_fast(hva, 1, writing, pages); > + npages = get_user_pages_fast(hva, 1, writing ? FOLL_WRITE : 0, pages); Just requesting for opinion, * writing ? FOLL_WRITE : 0 * is used in many places. How about placing it in a macro/ inline ? > if (npages < 1) { > /* Check if it's an I/O mapping */ > down_read(¤t->mm->mmap_sem); > @@ -1175,7 +1175,7 @@ void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa, > if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) > goto err; > hva = gfn_to_hva_memslot(memslot, gfn); > - npages = get_user_pages_fast(hva, 1, 1, pages); > + npages = get_user_pages_fast(hva, 1, FOLL_WRITE, pages); > if (npages < 1) > goto err; > page = pages[0]; > diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c > index 24296f4cadc6..e0af53fd78c5 100644 > --- a/arch/powerpc/kvm/e500_mmu.c > +++ b/arch/powerpc/kvm/e500_mmu.c > @@ -783,7 +783,7 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, > if (!pages) > return -ENOMEM; > > - ret = get_user_pages_fast(cfg->array, num_pages, 1, pages); > + ret = get_user_pages_fast(cfg->array, num_pages, FOLL_WRITE, pages); > if (ret < 0) > goto free_pages; > > diff --git a/arch/powerpc/mm/mmu_context_iommu.c b/arch/powerpc/mm/mmu_context_iommu.c > index a712a650a8b6..acb0990c8364 100644 > --- a/arch/powerpc/mm/mmu_context_iommu.c > +++ b/arch/powerpc/mm/mmu_context_iommu.c > @@ -190,7 +190,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua, > for (i = 0; i < entries; ++i) { > cur_ua = ua + (i << PAGE_SHIFT); > if (1 != get_user_pages_fast(cur_ua, > - 1/* pages */, 1/* iswrite */, &page)) { > + 1/* pages */, FOLL_WRITE, &page)) { > ret = -EFAULT; > for (j = 0; j < i; ++j) > put_page(pfn_to_page(mem->hpas[j] >> > @@ -209,7 +209,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua, > if (mm_iommu_move_page_from_cma(page)) > goto populate; > if (1 != get_user_pages_fast(cur_ua, > - 1/* pages */, 1/* iswrite */, > + 1/* pages */, FOLL_WRITE, > &page)) { > ret = -EFAULT; > for (j = 0; j < i; ++j) > diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c > index fcb55b02990e..69d9366b966c 100644 > --- a/arch/s390/kvm/interrupt.c > +++ b/arch/s390/kvm/interrupt.c > @@ -2278,7 +2278,7 @@ static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) > ret = -EFAULT; > goto out; > } > - ret = get_user_pages_fast(map->addr, 1, 1, &map->page); > + ret = get_user_pages_fast(map->addr, 1, FOLL_WRITE, &map->page); > if (ret < 0) > goto out; > BUG_ON(ret != 1); > diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c > index 2809d11c7a28..0a6faf3d9960 100644 > --- a/arch/s390/mm/gup.c > +++ b/arch/s390/mm/gup.c > @@ -265,7 +265,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -277,22 +277,22 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * requested. If nr_pages is 0 or negative, returns 0. If no pages > * were pinned, returns -errno. > */ > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > int nr, ret; > > might_sleep(); > start &= PAGE_MASK; > - nr = __get_user_pages_fast(start, nr_pages, write, pages); > + nr = __get_user_pages_fast(start, nr_pages, gup_flags & FOLL_WRITE, > + pages); > if (nr == nr_pages) > return nr; > > /* Try to get the remaining pages with get_user_pages */ > start += nr << PAGE_SHIFT; > pages += nr; > - ret = get_user_pages_unlocked(start, nr_pages - nr, pages, > - write ? FOLL_WRITE : 0); > + ret = get_user_pages_unlocked(start, nr_pages - nr, pages, gup_flags); > /* Have to be a bit careful with return values */ > if (nr > 0) > ret = (ret < 0) ? nr : ret + nr; > diff --git a/arch/sh/mm/gup.c b/arch/sh/mm/gup.c > index 3e27f6d1f1ec..277c882f7489 100644 > --- a/arch/sh/mm/gup.c > +++ b/arch/sh/mm/gup.c > @@ -204,7 +204,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -216,8 +216,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * requested. If nr_pages is 0 or negative, returns 0. If no pages > * were pinned, returns -errno. > */ > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > struct mm_struct *mm = current->mm; > unsigned long addr, len, end; > @@ -241,7 +241,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > next = pgd_addr_end(addr, end); > if (pgd_none(pgd)) > goto slow; > - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) > + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, > + pages, &nr)) > goto slow; > } while (pgdp++, addr = next, addr != end); > local_irq_enable(); > @@ -261,7 +262,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > ret = get_user_pages_unlocked(start, > (end - start) >> PAGE_SHIFT, pages, > - write ? FOLL_WRITE : 0); > + gup_flags); > > /* Have to be a bit careful with return values */ > if (nr > 0) { > diff --git a/arch/sparc/mm/gup.c b/arch/sparc/mm/gup.c > index aee6dba83d0e..1e770a517d4a 100644 > --- a/arch/sparc/mm/gup.c > +++ b/arch/sparc/mm/gup.c > @@ -245,8 +245,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > return nr; > } > > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > struct mm_struct *mm = current->mm; > unsigned long addr, len, end; > @@ -303,7 +303,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > next = pgd_addr_end(addr, end); > if (pgd_none(pgd)) > goto slow; > - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) > + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, > + pages, &nr)) > goto slow; > } while (pgdp++, addr = next, addr != end); > > @@ -324,7 +325,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > ret = get_user_pages_unlocked(start, > (end - start) >> PAGE_SHIFT, pages, > - write ? FOLL_WRITE : 0); > + gup_flags); > > /* Have to be a bit careful with return values */ > if (nr > 0) { > diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h > index 6bdca39829bc..08715034e315 100644 > --- a/arch/x86/kvm/paging_tmpl.h > +++ b/arch/x86/kvm/paging_tmpl.h > @@ -140,7 +140,7 @@ static int FNAME(cmpxchg_gpte)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, > pt_element_t *table; > struct page *page; > > - npages = get_user_pages_fast((unsigned long)ptep_user, 1, 1, &page); > + npages = get_user_pages_fast((unsigned long)ptep_user, 1, FOLL_WRITE, &page); > /* Check if the user is doing something meaningless. */ > if (unlikely(npages != 1)) > return -EFAULT; > diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c > index f13a3a24d360..173596a020cb 100644 > --- a/arch/x86/kvm/svm.c > +++ b/arch/x86/kvm/svm.c > @@ -1803,7 +1803,7 @@ static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr, > return NULL; > > /* Pin the user virtual address. */ > - npinned = get_user_pages_fast(uaddr, npages, write ? FOLL_WRITE : 0, pages); > + npinned = get_user_pages_fast(uaddr, npages, FOLL_WRITE, pages); > if (npinned != npages) { > pr_err("SEV: Failure locking %lu pages.\n", npages); > goto err; > diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-region.c > index e18a786fc943..c438722bf4e1 100644 > --- a/drivers/fpga/dfl-afu-dma-region.c > +++ b/drivers/fpga/dfl-afu-dma-region.c > @@ -102,7 +102,7 @@ static int afu_dma_pin_pages(struct dfl_feature_platform_data *pdata, > goto unlock_vm; > } > > - pinned = get_user_pages_fast(region->user_addr, npages, 1, > + pinned = get_user_pages_fast(region->user_addr, npages, FOLL_WRITE, > region->pages); > if (pinned < 0) { > ret = pinned; > diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dmablit.c > index 345bda4494e1..0c8b09602910 100644 > --- a/drivers/gpu/drm/via/via_dmablit.c > +++ b/drivers/gpu/drm/via/via_dmablit.c > @@ -239,7 +239,8 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer) > if (NULL == vsg->pages) > return -ENOMEM; > ret = get_user_pages_fast((unsigned long)xfer->mem_addr, > - vsg->num_pages, vsg->direction == DMA_FROM_DEVICE, > + vsg->num_pages, > + vsg->direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0, > vsg->pages); > if (ret != vsg->num_pages) { > if (ret < 0) > diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c > index 24b592c6522e..78ccacaf97d0 100644 > --- a/drivers/infiniband/hw/hfi1/user_pages.c > +++ b/drivers/infiniband/hw/hfi1/user_pages.c > @@ -105,7 +105,8 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np > { > int ret; > > - ret = get_user_pages_fast(vaddr, npages, writable, pages); > + ret = get_user_pages_fast(vaddr, npages, writable ? FOLL_WRITE : 0, > + pages); > if (ret < 0) > return ret; > > diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c > index 25265fd0fd6e..89cff9d1012b 100644 > --- a/drivers/misc/genwqe/card_utils.c > +++ b/drivers/misc/genwqe/card_utils.c > @@ -603,7 +603,7 @@ int genwqe_user_vmap(struct genwqe_dev *cd, struct dma_mapping *m, void *uaddr, > /* pin user pages in memory */ > rc = get_user_pages_fast(data & PAGE_MASK, /* page aligned addr */ > m->nr_pages, > - m->write, /* readable/writable */ > + m->write ? FOLL_WRITE : 0, /* readable/writable */ > m->page_list); /* ptrs to pages */ > if (rc < 0) > goto fail_get_user_pages; > diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c > index 997f92543dd4..422d08da3244 100644 > --- a/drivers/misc/vmw_vmci/vmci_host.c > +++ b/drivers/misc/vmw_vmci/vmci_host.c > @@ -242,7 +242,7 @@ static int vmci_host_setup_notify(struct vmci_ctx *context, > /* > * Lock physical page backing a given user VA. > */ > - retval = get_user_pages_fast(uva, 1, 1, &context->notify_page); > + retval = get_user_pages_fast(uva, 1, FOLL_WRITE, &context->notify_page); > if (retval != 1) { > context->notify_page = NULL; > return VMCI_ERROR_GENERIC; > diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c > index 264f4ed8eef2..c5396ee32e51 100644 > --- a/drivers/misc/vmw_vmci/vmci_queue_pair.c > +++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c > @@ -666,7 +666,8 @@ static int qp_host_get_user_memory(u64 produce_uva, > int err = VMCI_SUCCESS; > > retval = get_user_pages_fast((uintptr_t) produce_uva, > - produce_q->kernel_if->num_pages, 1, > + produce_q->kernel_if->num_pages, > + FOLL_WRITE, > produce_q->kernel_if->u.h.header_page); > if (retval < (int)produce_q->kernel_if->num_pages) { > pr_debug("get_user_pages_fast(produce) failed (retval=%d)", > @@ -678,7 +679,8 @@ static int qp_host_get_user_memory(u64 produce_uva, > } > > retval = get_user_pages_fast((uintptr_t) consume_uva, > - consume_q->kernel_if->num_pages, 1, > + consume_q->kernel_if->num_pages, > + FOLL_WRITE, > consume_q->kernel_if->u.h.header_page); > if (retval < (int)consume_q->kernel_if->num_pages) { > pr_debug("get_user_pages_fast(consume) failed (retval=%d)", > diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c > index 321bc673c417..cef0133aa47a 100644 > --- a/drivers/platform/goldfish/goldfish_pipe.c > +++ b/drivers/platform/goldfish/goldfish_pipe.c > @@ -274,7 +274,8 @@ static int pin_user_pages(unsigned long first_page, > *iter_last_page_size = last_page_size; > } > > - ret = get_user_pages_fast(first_page, requested_pages, !is_write, > + ret = get_user_pages_fast(first_page, requested_pages, > + !is_write ? FOLL_WRITE : 0, > pages); > if (ret <= 0) > return -EFAULT; > diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c > index cbe467ff1aba..f681b3e9e970 100644 > --- a/drivers/rapidio/devices/rio_mport_cdev.c > +++ b/drivers/rapidio/devices/rio_mport_cdev.c > @@ -868,7 +868,9 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode, > > pinned = get_user_pages_fast( > (unsigned long)xfer->loc_addr & PAGE_MASK, > - nr_pages, dir == DMA_FROM_DEVICE, page_list); > + nr_pages, > + dir == DMA_FROM_DEVICE ? FOLL_WRITE : 0, > + page_list); > > if (pinned != nr_pages) { > if (pinned < 0) { > diff --git a/drivers/sbus/char/oradax.c b/drivers/sbus/char/oradax.c > index 6516bc3cb58b..790aa148670d 100644 > --- a/drivers/sbus/char/oradax.c > +++ b/drivers/sbus/char/oradax.c > @@ -437,7 +437,7 @@ static int dax_lock_page(void *va, struct page **p) > > dax_dbg("uva %p", va); > > - ret = get_user_pages_fast((unsigned long)va, 1, 1, p); > + ret = get_user_pages_fast((unsigned long)va, 1, FOLL_WRITE, p); > if (ret == 1) { > dax_dbg("locked page %p, for VA %p", *p, va); > return 0; > diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c > index 7ff22d3f03e3..871b25914c07 100644 > --- a/drivers/scsi/st.c > +++ b/drivers/scsi/st.c > @@ -4918,7 +4918,8 @@ static int sgl_map_user_pages(struct st_buffer *STbp, > > /* Try to fault in all of the necessary pages */ > /* rw==READ means read from drive, write into memory area */ > - res = get_user_pages_fast(uaddr, nr_pages, rw == READ, pages); > + res = get_user_pages_fast(uaddr, nr_pages, rw == READ ? FOLL_WRITE : 0, > + pages); > > /* Errors and no page mapped should return here */ > if (res < nr_pages) > diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c > index 26755d9ca41d..f67fdf1d3817 100644 > --- a/drivers/staging/gasket/gasket_page_table.c > +++ b/drivers/staging/gasket/gasket_page_table.c > @@ -486,8 +486,8 @@ static int gasket_perform_mapping(struct gasket_page_table *pg_tbl, > ptes[i].dma_addr = pg_tbl->coherent_pages[0].paddr + > off + i * PAGE_SIZE; > } else { > - ret = get_user_pages_fast(page_addr - offset, 1, 1, > - &page); > + ret = get_user_pages_fast(page_addr - offset, 1, > + FOLL_WRITE, &page); > > if (ret <= 0) { > dev_err(pg_tbl->device, > diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c > index 0b9ab1d0dd45..49fd7312e2aa 100644 > --- a/drivers/tee/tee_shm.c > +++ b/drivers/tee/tee_shm.c > @@ -273,7 +273,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, > goto err; > } > > - rc = get_user_pages_fast(start, num_pages, 1, shm->pages); > + rc = get_user_pages_fast(start, num_pages, FOLL_WRITE, shm->pages); > if (rc > 0) > shm->num_pages = rc; > if (rc != num_pages) { > diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c > index c424913324e3..a4b10bb4086b 100644 > --- a/drivers/vfio/vfio_iommu_spapr_tce.c > +++ b/drivers/vfio/vfio_iommu_spapr_tce.c > @@ -532,7 +532,8 @@ static int tce_iommu_use_page(unsigned long tce, unsigned long *hpa) > enum dma_data_direction direction = iommu_tce_direction(tce); > > if (get_user_pages_fast(tce & PAGE_MASK, 1, > - direction != DMA_TO_DEVICE, &page) != 1) > + direction != DMA_TO_DEVICE ? FOLL_WRITE : 0, > + &page) != 1) > return -EFAULT; > > *hpa = __pa((unsigned long) page_address(page)); > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index 24a129fcdd61..72685b1659ff 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -1700,7 +1700,7 @@ static int set_bit_to_user(int nr, void __user *addr) > int bit = nr + (log % PAGE_SIZE) * 8; > int r; > > - r = get_user_pages_fast(log, 1, 1, &page); > + r = get_user_pages_fast(log, 1, FOLL_WRITE, &page); > if (r < 0) > return r; > BUG_ON(r != 1); > diff --git a/drivers/video/fbdev/pvr2fb.c b/drivers/video/fbdev/pvr2fb.c > index 8a53d1de611d..41390c8e0f67 100644 > --- a/drivers/video/fbdev/pvr2fb.c > +++ b/drivers/video/fbdev/pvr2fb.c > @@ -686,7 +686,7 @@ static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, > if (!pages) > return -ENOMEM; > > - ret = get_user_pages_fast((unsigned long)buf, nr_pages, true, pages); > + ret = get_user_pages_fast((unsigned long)buf, nr_pages, FOLL_WRITE, pages); > if (ret < nr_pages) { > nr_pages = ret; > ret = -EINVAL; > diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c > index 8ba726e600e9..6446bcab4185 100644 > --- a/drivers/virt/fsl_hypervisor.c > +++ b/drivers/virt/fsl_hypervisor.c > @@ -244,7 +244,7 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) > > /* Get the physical addresses of the source buffer */ > num_pinned = get_user_pages_fast(param.local_vaddr - lb_offset, > - num_pages, param.source != -1, pages); > + num_pages, param.source != -1 ? FOLL_WRITE : 0, pages); > > if (num_pinned != num_pages) { > /* get_user_pages() failed */ > diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c > index 5efc5eee9544..7b47f1e6aab4 100644 > --- a/drivers/xen/gntdev.c > +++ b/drivers/xen/gntdev.c > @@ -852,7 +852,7 @@ static int gntdev_get_page(struct gntdev_copy_batch *batch, void __user *virt, > unsigned long xen_pfn; > int ret; > > - ret = get_user_pages_fast(addr, 1, writeable, &page); > + ret = get_user_pages_fast(addr, 1, writeable ? FOLL_WRITE : 0, &page); > if (ret < 0) > return ret; > > diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c > index 443bcd8c3c19..5a7c4fda682f 100644 > --- a/fs/orangefs/orangefs-bufmap.c > +++ b/fs/orangefs/orangefs-bufmap.c > @@ -269,7 +269,7 @@ orangefs_bufmap_map(struct orangefs_bufmap *bufmap, > > /* map the pages */ > ret = get_user_pages_fast((unsigned long)user_desc->ptr, > - bufmap->page_count, 1, bufmap->page_array); > + bufmap->page_count, FOLL_WRITE, bufmap->page_array); > > if (ret < 0) > return ret; > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 05a105d9d4c3..8e1f3cd7482a 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -1537,8 +1537,8 @@ long get_user_pages_locked(unsigned long start, unsigned long nr_pages, > long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages, > struct page **pages, unsigned int gup_flags); > > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages); > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages); > > /* Container for pinned pfns / pages */ > struct frame_vector { > diff --git a/kernel/futex.c b/kernel/futex.c > index fdd312da0992..e10209946f8b 100644 > --- a/kernel/futex.c > +++ b/kernel/futex.c > @@ -546,7 +546,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a > if (unlikely(should_fail_futex(fshared))) > return -EFAULT; > > - err = get_user_pages_fast(address, 1, 1, &page); > + err = get_user_pages_fast(address, 1, FOLL_WRITE, &page); > /* > * If write access is not required (eg. FUTEX_WAIT), try > * and get read-only access. > diff --git a/lib/iov_iter.c b/lib/iov_iter.c > index be4bd627caf0..6dbae0692719 100644 > --- a/lib/iov_iter.c > +++ b/lib/iov_iter.c > @@ -1280,7 +1280,9 @@ ssize_t iov_iter_get_pages(struct iov_iter *i, > len = maxpages * PAGE_SIZE; > addr &= ~(PAGE_SIZE - 1); > n = DIV_ROUND_UP(len, PAGE_SIZE); > - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, pages); > + res = get_user_pages_fast(addr, n, > + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, > + pages); > if (unlikely(res < 0)) > return res; > return (res == n ? len : res * PAGE_SIZE) - *start; > @@ -1361,7 +1363,8 @@ ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, > p = get_pages_array(n); > if (!p) > return -ENOMEM; > - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, p); > + res = get_user_pages_fast(addr, n, > + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, p); > if (unlikely(res < 0)) { > kvfree(p); > return res; > diff --git a/mm/gup.c b/mm/gup.c > index 681388236106..6f32d36b3c5b 100644 > --- a/mm/gup.c > +++ b/mm/gup.c > @@ -1863,7 +1863,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -1875,8 +1875,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > * requested. If nr_pages is 0 or negative, returns 0. If no pages > * were pinned, returns -errno. > */ > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > - struct page **pages) > +int get_user_pages_fast(unsigned long start, int nr_pages, > + unsigned int gup_flags, struct page **pages) > { > unsigned long addr, len, end; > int nr = 0, ret = 0; > @@ -1894,7 +1894,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > if (gup_fast_permitted(start, nr_pages)) { > local_irq_disable(); > - gup_pgd_range(addr, end, write ? FOLL_WRITE : 0, pages, &nr); > + gup_pgd_range(addr, end, gup_flags, pages, &nr); > local_irq_enable(); > ret = nr; > } > @@ -1905,7 +1905,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > pages += nr; > > ret = get_user_pages_unlocked(start, nr_pages - nr, pages, > - write ? FOLL_WRITE : 0); > + gup_flags); > > /* Have to be a bit careful with return values */ > if (nr > 0) { > diff --git a/mm/util.c b/mm/util.c > index 1ea055138043..01ffe145c62b 100644 > --- a/mm/util.c > +++ b/mm/util.c > @@ -306,7 +306,7 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); > * get_user_pages_fast() - pin user pages in memory > * @start: starting user address > * @nr_pages: number of pages from start to pin > - * @write: whether pages will be written to > + * @gup_flags: flags modifying pin behaviour > * @pages: array that receives pointers to the pages pinned. > * Should be at least nr_pages long. > * > @@ -327,10 +327,10 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); > * get_user_pages_fast simply falls back to get_user_pages. > */ > int __weak get_user_pages_fast(unsigned long start, > - int nr_pages, int write, struct page **pages) > + int nr_pages, unsigned int gup_flags, > + struct page **pages) > { > - return get_user_pages_unlocked(start, nr_pages, pages, > - write ? FOLL_WRITE : 0); > + return get_user_pages_unlocked(start, nr_pages, pages, gup_flags); > } > EXPORT_SYMBOL_GPL(get_user_pages_fast); > > diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c > index d3736f5bffec..74cafc0142ea 100644 > --- a/net/ceph/pagevec.c > +++ b/net/ceph/pagevec.c > @@ -27,7 +27,7 @@ struct page **ceph_get_direct_page_vector(const void __user *data, > while (got < num_pages) { > rc = get_user_pages_fast( > (unsigned long)data + ((unsigned long)got * PAGE_SIZE), > - num_pages - got, write_page, pages + got); > + num_pages - got, write_page ? FOLL_WRITE : 0, pages + got); > if (rc < 0) > break; > BUG_ON(rc == 0); > diff --git a/net/rds/info.c b/net/rds/info.c > index e367a97a18c8..03f6fd56d237 100644 > --- a/net/rds/info.c > +++ b/net/rds/info.c > @@ -193,7 +193,7 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval, > ret = -ENOMEM; > goto out; > } > - ret = get_user_pages_fast(start, nr_pages, 1, pages); > + ret = get_user_pages_fast(start, nr_pages, FOLL_WRITE, pages); > if (ret != nr_pages) { > if (ret > 0) > nr_pages = ret; > diff --git a/net/rds/rdma.c b/net/rds/rdma.c > index 182ab8430594..b340ed4fc43a 100644 > --- a/net/rds/rdma.c > +++ b/net/rds/rdma.c > @@ -158,7 +158,8 @@ static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages, > { > int ret; > > - ret = get_user_pages_fast(user_addr, nr_pages, write, pages); > + ret = get_user_pages_fast(user_addr, nr_pages, write ? FOLL_WRITE : 0, > + pages); > > if (ret >= 0 && ret < nr_pages) { > while (ret--) > -- > 2.20.1 >
On Thu, Feb 21, 2019 at 08:48:41AM +0530, Souptick Joarder wrote: > Hi Ira, > > On Wed, Feb 20, 2019 at 11:01 AM <ira.weiny@intel.com> wrote: > > > > From: Ira Weiny <ira.weiny@intel.com> > > > > To facilitate additional options to get_user_pages_fast() change the > > singular write parameter to be gup_flags. > > > > This patch does not change any functionality. New functionality will > > follow in subsequent patches. > > > > Some of the get_user_pages_fast() call sites were unchanged because they > > already passed FOLL_WRITE or 0 for the write parameter. > > > > Signed-off-by: Ira Weiny <ira.weiny@intel.com> > > --- [snip] > > diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c > > index bd2dcfbf00cd..8fcb0a921e46 100644 > > --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c > > +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c > > @@ -582,7 +582,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, > > /* If writing != 0, then the HPTE must allow writing, if we get here */ > > write_ok = writing; > > hva = gfn_to_hva_memslot(memslot, gfn); > > - npages = get_user_pages_fast(hva, 1, writing, pages); > > + npages = get_user_pages_fast(hva, 1, writing ? FOLL_WRITE : 0, pages); > > Just requesting for opinion, > * writing ? FOLL_WRITE : 0 * is used in many places. How about placing it in a > macro/ inline ? I don't really think this would gain much. And I don't think it would be more clear. In fact I can't even think of a macro name which would make sense. I'm inclined to leave this as written. Ira > > > if (npages < 1) { > > /* Check if it's an I/O mapping */ > > down_read(¤t->mm->mmap_sem); > > @@ -1175,7 +1175,7 @@ void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa, > > if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) > > goto err; > > hva = gfn_to_hva_memslot(memslot, gfn); > > - npages = get_user_pages_fast(hva, 1, 1, pages); > > + npages = get_user_pages_fast(hva, 1, FOLL_WRITE, pages); > > if (npages < 1) > > goto err; > > page = pages[0]; > > diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c > > index 24296f4cadc6..e0af53fd78c5 100644 > > --- a/arch/powerpc/kvm/e500_mmu.c > > +++ b/arch/powerpc/kvm/e500_mmu.c > > @@ -783,7 +783,7 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, > > if (!pages) > > return -ENOMEM; > > > > - ret = get_user_pages_fast(cfg->array, num_pages, 1, pages); > > + ret = get_user_pages_fast(cfg->array, num_pages, FOLL_WRITE, pages); > > if (ret < 0) > > goto free_pages; > > > > diff --git a/arch/powerpc/mm/mmu_context_iommu.c b/arch/powerpc/mm/mmu_context_iommu.c > > index a712a650a8b6..acb0990c8364 100644 > > --- a/arch/powerpc/mm/mmu_context_iommu.c > > +++ b/arch/powerpc/mm/mmu_context_iommu.c > > @@ -190,7 +190,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua, > > for (i = 0; i < entries; ++i) { > > cur_ua = ua + (i << PAGE_SHIFT); > > if (1 != get_user_pages_fast(cur_ua, > > - 1/* pages */, 1/* iswrite */, &page)) { > > + 1/* pages */, FOLL_WRITE, &page)) { > > ret = -EFAULT; > > for (j = 0; j < i; ++j) > > put_page(pfn_to_page(mem->hpas[j] >> > > @@ -209,7 +209,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua, > > if (mm_iommu_move_page_from_cma(page)) > > goto populate; > > if (1 != get_user_pages_fast(cur_ua, > > - 1/* pages */, 1/* iswrite */, > > + 1/* pages */, FOLL_WRITE, > > &page)) { > > ret = -EFAULT; > > for (j = 0; j < i; ++j) > > diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c > > index fcb55b02990e..69d9366b966c 100644 > > --- a/arch/s390/kvm/interrupt.c > > +++ b/arch/s390/kvm/interrupt.c > > @@ -2278,7 +2278,7 @@ static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) > > ret = -EFAULT; > > goto out; > > } > > - ret = get_user_pages_fast(map->addr, 1, 1, &map->page); > > + ret = get_user_pages_fast(map->addr, 1, FOLL_WRITE, &map->page); > > if (ret < 0) > > goto out; > > BUG_ON(ret != 1); > > diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c > > index 2809d11c7a28..0a6faf3d9960 100644 > > --- a/arch/s390/mm/gup.c > > +++ b/arch/s390/mm/gup.c > > @@ -265,7 +265,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > > * get_user_pages_fast() - pin user pages in memory > > * @start: starting user address > > * @nr_pages: number of pages from start to pin > > - * @write: whether pages will be written to > > + * @gup_flags: flags modifying pin behaviour > > * @pages: array that receives pointers to the pages pinned. > > * Should be at least nr_pages long. > > * > > @@ -277,22 +277,22 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > > * requested. If nr_pages is 0 or negative, returns 0. If no pages > > * were pinned, returns -errno. > > */ > > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > - struct page **pages) > > +int get_user_pages_fast(unsigned long start, int nr_pages, > > + unsigned int gup_flags, struct page **pages) > > { > > int nr, ret; > > > > might_sleep(); > > start &= PAGE_MASK; > > - nr = __get_user_pages_fast(start, nr_pages, write, pages); > > + nr = __get_user_pages_fast(start, nr_pages, gup_flags & FOLL_WRITE, > > + pages); > > if (nr == nr_pages) > > return nr; > > > > /* Try to get the remaining pages with get_user_pages */ > > start += nr << PAGE_SHIFT; > > pages += nr; > > - ret = get_user_pages_unlocked(start, nr_pages - nr, pages, > > - write ? FOLL_WRITE : 0); > > + ret = get_user_pages_unlocked(start, nr_pages - nr, pages, gup_flags); > > /* Have to be a bit careful with return values */ > > if (nr > 0) > > ret = (ret < 0) ? nr : ret + nr; > > diff --git a/arch/sh/mm/gup.c b/arch/sh/mm/gup.c > > index 3e27f6d1f1ec..277c882f7489 100644 > > --- a/arch/sh/mm/gup.c > > +++ b/arch/sh/mm/gup.c > > @@ -204,7 +204,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > > * get_user_pages_fast() - pin user pages in memory > > * @start: starting user address > > * @nr_pages: number of pages from start to pin > > - * @write: whether pages will be written to > > + * @gup_flags: flags modifying pin behaviour > > * @pages: array that receives pointers to the pages pinned. > > * Should be at least nr_pages long. > > * > > @@ -216,8 +216,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > > * requested. If nr_pages is 0 or negative, returns 0. If no pages > > * were pinned, returns -errno. > > */ > > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > - struct page **pages) > > +int get_user_pages_fast(unsigned long start, int nr_pages, > > + unsigned int gup_flags, struct page **pages) > > { > > struct mm_struct *mm = current->mm; > > unsigned long addr, len, end; > > @@ -241,7 +241,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > next = pgd_addr_end(addr, end); > > if (pgd_none(pgd)) > > goto slow; > > - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) > > + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, > > + pages, &nr)) > > goto slow; > > } while (pgdp++, addr = next, addr != end); > > local_irq_enable(); > > @@ -261,7 +262,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > > > ret = get_user_pages_unlocked(start, > > (end - start) >> PAGE_SHIFT, pages, > > - write ? FOLL_WRITE : 0); > > + gup_flags); > > > > /* Have to be a bit careful with return values */ > > if (nr > 0) { > > diff --git a/arch/sparc/mm/gup.c b/arch/sparc/mm/gup.c > > index aee6dba83d0e..1e770a517d4a 100644 > > --- a/arch/sparc/mm/gup.c > > +++ b/arch/sparc/mm/gup.c > > @@ -245,8 +245,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > > return nr; > > } > > > > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > - struct page **pages) > > +int get_user_pages_fast(unsigned long start, int nr_pages, > > + unsigned int gup_flags, struct page **pages) > > { > > struct mm_struct *mm = current->mm; > > unsigned long addr, len, end; > > @@ -303,7 +303,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > next = pgd_addr_end(addr, end); > > if (pgd_none(pgd)) > > goto slow; > > - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) > > + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, > > + pages, &nr)) > > goto slow; > > } while (pgdp++, addr = next, addr != end); > > > > @@ -324,7 +325,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > > > ret = get_user_pages_unlocked(start, > > (end - start) >> PAGE_SHIFT, pages, > > - write ? FOLL_WRITE : 0); > > + gup_flags); > > > > /* Have to be a bit careful with return values */ > > if (nr > 0) { > > diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h > > index 6bdca39829bc..08715034e315 100644 > > --- a/arch/x86/kvm/paging_tmpl.h > > +++ b/arch/x86/kvm/paging_tmpl.h > > @@ -140,7 +140,7 @@ static int FNAME(cmpxchg_gpte)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, > > pt_element_t *table; > > struct page *page; > > > > - npages = get_user_pages_fast((unsigned long)ptep_user, 1, 1, &page); > > + npages = get_user_pages_fast((unsigned long)ptep_user, 1, FOLL_WRITE, &page); > > /* Check if the user is doing something meaningless. */ > > if (unlikely(npages != 1)) > > return -EFAULT; > > diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c > > index f13a3a24d360..173596a020cb 100644 > > --- a/arch/x86/kvm/svm.c > > +++ b/arch/x86/kvm/svm.c > > @@ -1803,7 +1803,7 @@ static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr, > > return NULL; > > > > /* Pin the user virtual address. */ > > - npinned = get_user_pages_fast(uaddr, npages, write ? FOLL_WRITE : 0, pages); > > + npinned = get_user_pages_fast(uaddr, npages, FOLL_WRITE, pages); > > if (npinned != npages) { > > pr_err("SEV: Failure locking %lu pages.\n", npages); > > goto err; > > diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-region.c > > index e18a786fc943..c438722bf4e1 100644 > > --- a/drivers/fpga/dfl-afu-dma-region.c > > +++ b/drivers/fpga/dfl-afu-dma-region.c > > @@ -102,7 +102,7 @@ static int afu_dma_pin_pages(struct dfl_feature_platform_data *pdata, > > goto unlock_vm; > > } > > > > - pinned = get_user_pages_fast(region->user_addr, npages, 1, > > + pinned = get_user_pages_fast(region->user_addr, npages, FOLL_WRITE, > > region->pages); > > if (pinned < 0) { > > ret = pinned; > > diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dmablit.c > > index 345bda4494e1..0c8b09602910 100644 > > --- a/drivers/gpu/drm/via/via_dmablit.c > > +++ b/drivers/gpu/drm/via/via_dmablit.c > > @@ -239,7 +239,8 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer) > > if (NULL == vsg->pages) > > return -ENOMEM; > > ret = get_user_pages_fast((unsigned long)xfer->mem_addr, > > - vsg->num_pages, vsg->direction == DMA_FROM_DEVICE, > > + vsg->num_pages, > > + vsg->direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0, > > vsg->pages); > > if (ret != vsg->num_pages) { > > if (ret < 0) > > diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c > > index 24b592c6522e..78ccacaf97d0 100644 > > --- a/drivers/infiniband/hw/hfi1/user_pages.c > > +++ b/drivers/infiniband/hw/hfi1/user_pages.c > > @@ -105,7 +105,8 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np > > { > > int ret; > > > > - ret = get_user_pages_fast(vaddr, npages, writable, pages); > > + ret = get_user_pages_fast(vaddr, npages, writable ? FOLL_WRITE : 0, > > + pages); > > if (ret < 0) > > return ret; > > > > diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c > > index 25265fd0fd6e..89cff9d1012b 100644 > > --- a/drivers/misc/genwqe/card_utils.c > > +++ b/drivers/misc/genwqe/card_utils.c > > @@ -603,7 +603,7 @@ int genwqe_user_vmap(struct genwqe_dev *cd, struct dma_mapping *m, void *uaddr, > > /* pin user pages in memory */ > > rc = get_user_pages_fast(data & PAGE_MASK, /* page aligned addr */ > > m->nr_pages, > > - m->write, /* readable/writable */ > > + m->write ? FOLL_WRITE : 0, /* readable/writable */ > > m->page_list); /* ptrs to pages */ > > if (rc < 0) > > goto fail_get_user_pages; > > diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c > > index 997f92543dd4..422d08da3244 100644 > > --- a/drivers/misc/vmw_vmci/vmci_host.c > > +++ b/drivers/misc/vmw_vmci/vmci_host.c > > @@ -242,7 +242,7 @@ static int vmci_host_setup_notify(struct vmci_ctx *context, > > /* > > * Lock physical page backing a given user VA. > > */ > > - retval = get_user_pages_fast(uva, 1, 1, &context->notify_page); > > + retval = get_user_pages_fast(uva, 1, FOLL_WRITE, &context->notify_page); > > if (retval != 1) { > > context->notify_page = NULL; > > return VMCI_ERROR_GENERIC; > > diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c > > index 264f4ed8eef2..c5396ee32e51 100644 > > --- a/drivers/misc/vmw_vmci/vmci_queue_pair.c > > +++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c > > @@ -666,7 +666,8 @@ static int qp_host_get_user_memory(u64 produce_uva, > > int err = VMCI_SUCCESS; > > > > retval = get_user_pages_fast((uintptr_t) produce_uva, > > - produce_q->kernel_if->num_pages, 1, > > + produce_q->kernel_if->num_pages, > > + FOLL_WRITE, > > produce_q->kernel_if->u.h.header_page); > > if (retval < (int)produce_q->kernel_if->num_pages) { > > pr_debug("get_user_pages_fast(produce) failed (retval=%d)", > > @@ -678,7 +679,8 @@ static int qp_host_get_user_memory(u64 produce_uva, > > } > > > > retval = get_user_pages_fast((uintptr_t) consume_uva, > > - consume_q->kernel_if->num_pages, 1, > > + consume_q->kernel_if->num_pages, > > + FOLL_WRITE, > > consume_q->kernel_if->u.h.header_page); > > if (retval < (int)consume_q->kernel_if->num_pages) { > > pr_debug("get_user_pages_fast(consume) failed (retval=%d)", > > diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c > > index 321bc673c417..cef0133aa47a 100644 > > --- a/drivers/platform/goldfish/goldfish_pipe.c > > +++ b/drivers/platform/goldfish/goldfish_pipe.c > > @@ -274,7 +274,8 @@ static int pin_user_pages(unsigned long first_page, > > *iter_last_page_size = last_page_size; > > } > > > > - ret = get_user_pages_fast(first_page, requested_pages, !is_write, > > + ret = get_user_pages_fast(first_page, requested_pages, > > + !is_write ? FOLL_WRITE : 0, > > pages); > > if (ret <= 0) > > return -EFAULT; > > diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c > > index cbe467ff1aba..f681b3e9e970 100644 > > --- a/drivers/rapidio/devices/rio_mport_cdev.c > > +++ b/drivers/rapidio/devices/rio_mport_cdev.c > > @@ -868,7 +868,9 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode, > > > > pinned = get_user_pages_fast( > > (unsigned long)xfer->loc_addr & PAGE_MASK, > > - nr_pages, dir == DMA_FROM_DEVICE, page_list); > > + nr_pages, > > + dir == DMA_FROM_DEVICE ? FOLL_WRITE : 0, > > + page_list); > > > > if (pinned != nr_pages) { > > if (pinned < 0) { > > diff --git a/drivers/sbus/char/oradax.c b/drivers/sbus/char/oradax.c > > index 6516bc3cb58b..790aa148670d 100644 > > --- a/drivers/sbus/char/oradax.c > > +++ b/drivers/sbus/char/oradax.c > > @@ -437,7 +437,7 @@ static int dax_lock_page(void *va, struct page **p) > > > > dax_dbg("uva %p", va); > > > > - ret = get_user_pages_fast((unsigned long)va, 1, 1, p); > > + ret = get_user_pages_fast((unsigned long)va, 1, FOLL_WRITE, p); > > if (ret == 1) { > > dax_dbg("locked page %p, for VA %p", *p, va); > > return 0; > > diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c > > index 7ff22d3f03e3..871b25914c07 100644 > > --- a/drivers/scsi/st.c > > +++ b/drivers/scsi/st.c > > @@ -4918,7 +4918,8 @@ static int sgl_map_user_pages(struct st_buffer *STbp, > > > > /* Try to fault in all of the necessary pages */ > > /* rw==READ means read from drive, write into memory area */ > > - res = get_user_pages_fast(uaddr, nr_pages, rw == READ, pages); > > + res = get_user_pages_fast(uaddr, nr_pages, rw == READ ? FOLL_WRITE : 0, > > + pages); > > > > /* Errors and no page mapped should return here */ > > if (res < nr_pages) > > diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c > > index 26755d9ca41d..f67fdf1d3817 100644 > > --- a/drivers/staging/gasket/gasket_page_table.c > > +++ b/drivers/staging/gasket/gasket_page_table.c > > @@ -486,8 +486,8 @@ static int gasket_perform_mapping(struct gasket_page_table *pg_tbl, > > ptes[i].dma_addr = pg_tbl->coherent_pages[0].paddr + > > off + i * PAGE_SIZE; > > } else { > > - ret = get_user_pages_fast(page_addr - offset, 1, 1, > > - &page); > > + ret = get_user_pages_fast(page_addr - offset, 1, > > + FOLL_WRITE, &page); > > > > if (ret <= 0) { > > dev_err(pg_tbl->device, > > diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c > > index 0b9ab1d0dd45..49fd7312e2aa 100644 > > --- a/drivers/tee/tee_shm.c > > +++ b/drivers/tee/tee_shm.c > > @@ -273,7 +273,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, > > goto err; > > } > > > > - rc = get_user_pages_fast(start, num_pages, 1, shm->pages); > > + rc = get_user_pages_fast(start, num_pages, FOLL_WRITE, shm->pages); > > if (rc > 0) > > shm->num_pages = rc; > > if (rc != num_pages) { > > diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c > > index c424913324e3..a4b10bb4086b 100644 > > --- a/drivers/vfio/vfio_iommu_spapr_tce.c > > +++ b/drivers/vfio/vfio_iommu_spapr_tce.c > > @@ -532,7 +532,8 @@ static int tce_iommu_use_page(unsigned long tce, unsigned long *hpa) > > enum dma_data_direction direction = iommu_tce_direction(tce); > > > > if (get_user_pages_fast(tce & PAGE_MASK, 1, > > - direction != DMA_TO_DEVICE, &page) != 1) > > + direction != DMA_TO_DEVICE ? FOLL_WRITE : 0, > > + &page) != 1) > > return -EFAULT; > > > > *hpa = __pa((unsigned long) page_address(page)); > > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > > index 24a129fcdd61..72685b1659ff 100644 > > --- a/drivers/vhost/vhost.c > > +++ b/drivers/vhost/vhost.c > > @@ -1700,7 +1700,7 @@ static int set_bit_to_user(int nr, void __user *addr) > > int bit = nr + (log % PAGE_SIZE) * 8; > > int r; > > > > - r = get_user_pages_fast(log, 1, 1, &page); > > + r = get_user_pages_fast(log, 1, FOLL_WRITE, &page); > > if (r < 0) > > return r; > > BUG_ON(r != 1); > > diff --git a/drivers/video/fbdev/pvr2fb.c b/drivers/video/fbdev/pvr2fb.c > > index 8a53d1de611d..41390c8e0f67 100644 > > --- a/drivers/video/fbdev/pvr2fb.c > > +++ b/drivers/video/fbdev/pvr2fb.c > > @@ -686,7 +686,7 @@ static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, > > if (!pages) > > return -ENOMEM; > > > > - ret = get_user_pages_fast((unsigned long)buf, nr_pages, true, pages); > > + ret = get_user_pages_fast((unsigned long)buf, nr_pages, FOLL_WRITE, pages); > > if (ret < nr_pages) { > > nr_pages = ret; > > ret = -EINVAL; > > diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c > > index 8ba726e600e9..6446bcab4185 100644 > > --- a/drivers/virt/fsl_hypervisor.c > > +++ b/drivers/virt/fsl_hypervisor.c > > @@ -244,7 +244,7 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) > > > > /* Get the physical addresses of the source buffer */ > > num_pinned = get_user_pages_fast(param.local_vaddr - lb_offset, > > - num_pages, param.source != -1, pages); > > + num_pages, param.source != -1 ? FOLL_WRITE : 0, pages); > > > > if (num_pinned != num_pages) { > > /* get_user_pages() failed */ > > diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c > > index 5efc5eee9544..7b47f1e6aab4 100644 > > --- a/drivers/xen/gntdev.c > > +++ b/drivers/xen/gntdev.c > > @@ -852,7 +852,7 @@ static int gntdev_get_page(struct gntdev_copy_batch *batch, void __user *virt, > > unsigned long xen_pfn; > > int ret; > > > > - ret = get_user_pages_fast(addr, 1, writeable, &page); > > + ret = get_user_pages_fast(addr, 1, writeable ? FOLL_WRITE : 0, &page); > > if (ret < 0) > > return ret; > > > > diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c > > index 443bcd8c3c19..5a7c4fda682f 100644 > > --- a/fs/orangefs/orangefs-bufmap.c > > +++ b/fs/orangefs/orangefs-bufmap.c > > @@ -269,7 +269,7 @@ orangefs_bufmap_map(struct orangefs_bufmap *bufmap, > > > > /* map the pages */ > > ret = get_user_pages_fast((unsigned long)user_desc->ptr, > > - bufmap->page_count, 1, bufmap->page_array); > > + bufmap->page_count, FOLL_WRITE, bufmap->page_array); > > > > if (ret < 0) > > return ret; > > diff --git a/include/linux/mm.h b/include/linux/mm.h > > index 05a105d9d4c3..8e1f3cd7482a 100644 > > --- a/include/linux/mm.h > > +++ b/include/linux/mm.h > > @@ -1537,8 +1537,8 @@ long get_user_pages_locked(unsigned long start, unsigned long nr_pages, > > long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages, > > struct page **pages, unsigned int gup_flags); > > > > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > - struct page **pages); > > +int get_user_pages_fast(unsigned long start, int nr_pages, > > + unsigned int gup_flags, struct page **pages); > > > > /* Container for pinned pfns / pages */ > > struct frame_vector { > > diff --git a/kernel/futex.c b/kernel/futex.c > > index fdd312da0992..e10209946f8b 100644 > > --- a/kernel/futex.c > > +++ b/kernel/futex.c > > @@ -546,7 +546,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a > > if (unlikely(should_fail_futex(fshared))) > > return -EFAULT; > > > > - err = get_user_pages_fast(address, 1, 1, &page); > > + err = get_user_pages_fast(address, 1, FOLL_WRITE, &page); > > /* > > * If write access is not required (eg. FUTEX_WAIT), try > > * and get read-only access. > > diff --git a/lib/iov_iter.c b/lib/iov_iter.c > > index be4bd627caf0..6dbae0692719 100644 > > --- a/lib/iov_iter.c > > +++ b/lib/iov_iter.c > > @@ -1280,7 +1280,9 @@ ssize_t iov_iter_get_pages(struct iov_iter *i, > > len = maxpages * PAGE_SIZE; > > addr &= ~(PAGE_SIZE - 1); > > n = DIV_ROUND_UP(len, PAGE_SIZE); > > - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, pages); > > + res = get_user_pages_fast(addr, n, > > + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, > > + pages); > > if (unlikely(res < 0)) > > return res; > > return (res == n ? len : res * PAGE_SIZE) - *start; > > @@ -1361,7 +1363,8 @@ ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, > > p = get_pages_array(n); > > if (!p) > > return -ENOMEM; > > - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, p); > > + res = get_user_pages_fast(addr, n, > > + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, p); > > if (unlikely(res < 0)) { > > kvfree(p); > > return res; > > diff --git a/mm/gup.c b/mm/gup.c > > index 681388236106..6f32d36b3c5b 100644 > > --- a/mm/gup.c > > +++ b/mm/gup.c > > @@ -1863,7 +1863,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > > * get_user_pages_fast() - pin user pages in memory > > * @start: starting user address > > * @nr_pages: number of pages from start to pin > > - * @write: whether pages will be written to > > + * @gup_flags: flags modifying pin behaviour > > * @pages: array that receives pointers to the pages pinned. > > * Should be at least nr_pages long. > > * > > @@ -1875,8 +1875,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, > > * requested. If nr_pages is 0 or negative, returns 0. If no pages > > * were pinned, returns -errno. > > */ > > -int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > - struct page **pages) > > +int get_user_pages_fast(unsigned long start, int nr_pages, > > + unsigned int gup_flags, struct page **pages) > > { > > unsigned long addr, len, end; > > int nr = 0, ret = 0; > > @@ -1894,7 +1894,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > > > if (gup_fast_permitted(start, nr_pages)) { > > local_irq_disable(); > > - gup_pgd_range(addr, end, write ? FOLL_WRITE : 0, pages, &nr); > > + gup_pgd_range(addr, end, gup_flags, pages, &nr); > > local_irq_enable(); > > ret = nr; > > } > > @@ -1905,7 +1905,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, > > pages += nr; > > > > ret = get_user_pages_unlocked(start, nr_pages - nr, pages, > > - write ? FOLL_WRITE : 0); > > + gup_flags); > > > > /* Have to be a bit careful with return values */ > > if (nr > 0) { > > diff --git a/mm/util.c b/mm/util.c > > index 1ea055138043..01ffe145c62b 100644 > > --- a/mm/util.c > > +++ b/mm/util.c > > @@ -306,7 +306,7 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); > > * get_user_pages_fast() - pin user pages in memory > > * @start: starting user address > > * @nr_pages: number of pages from start to pin > > - * @write: whether pages will be written to > > + * @gup_flags: flags modifying pin behaviour > > * @pages: array that receives pointers to the pages pinned. > > * Should be at least nr_pages long. > > * > > @@ -327,10 +327,10 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); > > * get_user_pages_fast simply falls back to get_user_pages. > > */ > > int __weak get_user_pages_fast(unsigned long start, > > - int nr_pages, int write, struct page **pages) > > + int nr_pages, unsigned int gup_flags, > > + struct page **pages) > > { > > - return get_user_pages_unlocked(start, nr_pages, pages, > > - write ? FOLL_WRITE : 0); > > + return get_user_pages_unlocked(start, nr_pages, pages, gup_flags); > > } > > EXPORT_SYMBOL_GPL(get_user_pages_fast); > > > > diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c > > index d3736f5bffec..74cafc0142ea 100644 > > --- a/net/ceph/pagevec.c > > +++ b/net/ceph/pagevec.c > > @@ -27,7 +27,7 @@ struct page **ceph_get_direct_page_vector(const void __user *data, > > while (got < num_pages) { > > rc = get_user_pages_fast( > > (unsigned long)data + ((unsigned long)got * PAGE_SIZE), > > - num_pages - got, write_page, pages + got); > > + num_pages - got, write_page ? FOLL_WRITE : 0, pages + got); > > if (rc < 0) > > break; > > BUG_ON(rc == 0); > > diff --git a/net/rds/info.c b/net/rds/info.c > > index e367a97a18c8..03f6fd56d237 100644 > > --- a/net/rds/info.c > > +++ b/net/rds/info.c > > @@ -193,7 +193,7 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval, > > ret = -ENOMEM; > > goto out; > > } > > - ret = get_user_pages_fast(start, nr_pages, 1, pages); > > + ret = get_user_pages_fast(start, nr_pages, FOLL_WRITE, pages); > > if (ret != nr_pages) { > > if (ret > 0) > > nr_pages = ret; > > diff --git a/net/rds/rdma.c b/net/rds/rdma.c > > index 182ab8430594..b340ed4fc43a 100644 > > --- a/net/rds/rdma.c > > +++ b/net/rds/rdma.c > > @@ -158,7 +158,8 @@ static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages, > > { > > int ret; > > > > - ret = get_user_pages_fast(user_addr, nr_pages, write, pages); > > + ret = get_user_pages_fast(user_addr, nr_pages, write ? FOLL_WRITE : 0, > > + pages); > > > > if (ret >= 0 && ret < nr_pages) { > > while (ret--) > > -- > > 2.20.1 > > >
diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c index 0d14e0d8eacf..4c2b4483683c 100644 --- a/arch/mips/mm/gup.c +++ b/arch/mips/mm/gup.c @@ -235,7 +235,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -247,8 +247,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * requested. If nr_pages is 0 or negative, returns 0. If no pages * were pinned, returns -errno. */ -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { struct mm_struct *mm = current->mm; unsigned long addr, len, end; @@ -273,7 +273,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, next = pgd_addr_end(addr, end); if (pgd_none(pgd)) goto slow; - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, + pages, &nr)) goto slow; } while (pgdp++, addr = next, addr != end); local_irq_enable(); @@ -289,7 +290,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, pages += nr; ret = get_user_pages_unlocked(start, (end - start) >> PAGE_SHIFT, - pages, write ? FOLL_WRITE : 0); + pages, gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) { diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c index bd2dcfbf00cd..8fcb0a921e46 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c @@ -582,7 +582,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, /* If writing != 0, then the HPTE must allow writing, if we get here */ write_ok = writing; hva = gfn_to_hva_memslot(memslot, gfn); - npages = get_user_pages_fast(hva, 1, writing, pages); + npages = get_user_pages_fast(hva, 1, writing ? FOLL_WRITE : 0, pages); if (npages < 1) { /* Check if it's an I/O mapping */ down_read(¤t->mm->mmap_sem); @@ -1175,7 +1175,7 @@ void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa, if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) goto err; hva = gfn_to_hva_memslot(memslot, gfn); - npages = get_user_pages_fast(hva, 1, 1, pages); + npages = get_user_pages_fast(hva, 1, FOLL_WRITE, pages); if (npages < 1) goto err; page = pages[0]; diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c index 24296f4cadc6..e0af53fd78c5 100644 --- a/arch/powerpc/kvm/e500_mmu.c +++ b/arch/powerpc/kvm/e500_mmu.c @@ -783,7 +783,7 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, if (!pages) return -ENOMEM; - ret = get_user_pages_fast(cfg->array, num_pages, 1, pages); + ret = get_user_pages_fast(cfg->array, num_pages, FOLL_WRITE, pages); if (ret < 0) goto free_pages; diff --git a/arch/powerpc/mm/mmu_context_iommu.c b/arch/powerpc/mm/mmu_context_iommu.c index a712a650a8b6..acb0990c8364 100644 --- a/arch/powerpc/mm/mmu_context_iommu.c +++ b/arch/powerpc/mm/mmu_context_iommu.c @@ -190,7 +190,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua, for (i = 0; i < entries; ++i) { cur_ua = ua + (i << PAGE_SHIFT); if (1 != get_user_pages_fast(cur_ua, - 1/* pages */, 1/* iswrite */, &page)) { + 1/* pages */, FOLL_WRITE, &page)) { ret = -EFAULT; for (j = 0; j < i; ++j) put_page(pfn_to_page(mem->hpas[j] >> @@ -209,7 +209,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua, if (mm_iommu_move_page_from_cma(page)) goto populate; if (1 != get_user_pages_fast(cur_ua, - 1/* pages */, 1/* iswrite */, + 1/* pages */, FOLL_WRITE, &page)) { ret = -EFAULT; for (j = 0; j < i; ++j) diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index fcb55b02990e..69d9366b966c 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -2278,7 +2278,7 @@ static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) ret = -EFAULT; goto out; } - ret = get_user_pages_fast(map->addr, 1, 1, &map->page); + ret = get_user_pages_fast(map->addr, 1, FOLL_WRITE, &map->page); if (ret < 0) goto out; BUG_ON(ret != 1); diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c index 2809d11c7a28..0a6faf3d9960 100644 --- a/arch/s390/mm/gup.c +++ b/arch/s390/mm/gup.c @@ -265,7 +265,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -277,22 +277,22 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * requested. If nr_pages is 0 or negative, returns 0. If no pages * were pinned, returns -errno. */ -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { int nr, ret; might_sleep(); start &= PAGE_MASK; - nr = __get_user_pages_fast(start, nr_pages, write, pages); + nr = __get_user_pages_fast(start, nr_pages, gup_flags & FOLL_WRITE, + pages); if (nr == nr_pages) return nr; /* Try to get the remaining pages with get_user_pages */ start += nr << PAGE_SHIFT; pages += nr; - ret = get_user_pages_unlocked(start, nr_pages - nr, pages, - write ? FOLL_WRITE : 0); + ret = get_user_pages_unlocked(start, nr_pages - nr, pages, gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) ret = (ret < 0) ? nr : ret + nr; diff --git a/arch/sh/mm/gup.c b/arch/sh/mm/gup.c index 3e27f6d1f1ec..277c882f7489 100644 --- a/arch/sh/mm/gup.c +++ b/arch/sh/mm/gup.c @@ -204,7 +204,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -216,8 +216,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * requested. If nr_pages is 0 or negative, returns 0. If no pages * were pinned, returns -errno. */ -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { struct mm_struct *mm = current->mm; unsigned long addr, len, end; @@ -241,7 +241,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, next = pgd_addr_end(addr, end); if (pgd_none(pgd)) goto slow; - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, + pages, &nr)) goto slow; } while (pgdp++, addr = next, addr != end); local_irq_enable(); @@ -261,7 +262,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, ret = get_user_pages_unlocked(start, (end - start) >> PAGE_SHIFT, pages, - write ? FOLL_WRITE : 0); + gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) { diff --git a/arch/sparc/mm/gup.c b/arch/sparc/mm/gup.c index aee6dba83d0e..1e770a517d4a 100644 --- a/arch/sparc/mm/gup.c +++ b/arch/sparc/mm/gup.c @@ -245,8 +245,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, return nr; } -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { struct mm_struct *mm = current->mm; unsigned long addr, len, end; @@ -303,7 +303,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, next = pgd_addr_end(addr, end); if (pgd_none(pgd)) goto slow; - if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) + if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE, + pages, &nr)) goto slow; } while (pgdp++, addr = next, addr != end); @@ -324,7 +325,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, ret = get_user_pages_unlocked(start, (end - start) >> PAGE_SHIFT, pages, - write ? FOLL_WRITE : 0); + gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) { diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 6bdca39829bc..08715034e315 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -140,7 +140,7 @@ static int FNAME(cmpxchg_gpte)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, pt_element_t *table; struct page *page; - npages = get_user_pages_fast((unsigned long)ptep_user, 1, 1, &page); + npages = get_user_pages_fast((unsigned long)ptep_user, 1, FOLL_WRITE, &page); /* Check if the user is doing something meaningless. */ if (unlikely(npages != 1)) return -EFAULT; diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index f13a3a24d360..173596a020cb 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1803,7 +1803,7 @@ static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr, return NULL; /* Pin the user virtual address. */ - npinned = get_user_pages_fast(uaddr, npages, write ? FOLL_WRITE : 0, pages); + npinned = get_user_pages_fast(uaddr, npages, FOLL_WRITE, pages); if (npinned != npages) { pr_err("SEV: Failure locking %lu pages.\n", npages); goto err; diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-region.c index e18a786fc943..c438722bf4e1 100644 --- a/drivers/fpga/dfl-afu-dma-region.c +++ b/drivers/fpga/dfl-afu-dma-region.c @@ -102,7 +102,7 @@ static int afu_dma_pin_pages(struct dfl_feature_platform_data *pdata, goto unlock_vm; } - pinned = get_user_pages_fast(region->user_addr, npages, 1, + pinned = get_user_pages_fast(region->user_addr, npages, FOLL_WRITE, region->pages); if (pinned < 0) { ret = pinned; diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dmablit.c index 345bda4494e1..0c8b09602910 100644 --- a/drivers/gpu/drm/via/via_dmablit.c +++ b/drivers/gpu/drm/via/via_dmablit.c @@ -239,7 +239,8 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer) if (NULL == vsg->pages) return -ENOMEM; ret = get_user_pages_fast((unsigned long)xfer->mem_addr, - vsg->num_pages, vsg->direction == DMA_FROM_DEVICE, + vsg->num_pages, + vsg->direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0, vsg->pages); if (ret != vsg->num_pages) { if (ret < 0) diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c index 24b592c6522e..78ccacaf97d0 100644 --- a/drivers/infiniband/hw/hfi1/user_pages.c +++ b/drivers/infiniband/hw/hfi1/user_pages.c @@ -105,7 +105,8 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np { int ret; - ret = get_user_pages_fast(vaddr, npages, writable, pages); + ret = get_user_pages_fast(vaddr, npages, writable ? FOLL_WRITE : 0, + pages); if (ret < 0) return ret; diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c index 25265fd0fd6e..89cff9d1012b 100644 --- a/drivers/misc/genwqe/card_utils.c +++ b/drivers/misc/genwqe/card_utils.c @@ -603,7 +603,7 @@ int genwqe_user_vmap(struct genwqe_dev *cd, struct dma_mapping *m, void *uaddr, /* pin user pages in memory */ rc = get_user_pages_fast(data & PAGE_MASK, /* page aligned addr */ m->nr_pages, - m->write, /* readable/writable */ + m->write ? FOLL_WRITE : 0, /* readable/writable */ m->page_list); /* ptrs to pages */ if (rc < 0) goto fail_get_user_pages; diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c index 997f92543dd4..422d08da3244 100644 --- a/drivers/misc/vmw_vmci/vmci_host.c +++ b/drivers/misc/vmw_vmci/vmci_host.c @@ -242,7 +242,7 @@ static int vmci_host_setup_notify(struct vmci_ctx *context, /* * Lock physical page backing a given user VA. */ - retval = get_user_pages_fast(uva, 1, 1, &context->notify_page); + retval = get_user_pages_fast(uva, 1, FOLL_WRITE, &context->notify_page); if (retval != 1) { context->notify_page = NULL; return VMCI_ERROR_GENERIC; diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c index 264f4ed8eef2..c5396ee32e51 100644 --- a/drivers/misc/vmw_vmci/vmci_queue_pair.c +++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c @@ -666,7 +666,8 @@ static int qp_host_get_user_memory(u64 produce_uva, int err = VMCI_SUCCESS; retval = get_user_pages_fast((uintptr_t) produce_uva, - produce_q->kernel_if->num_pages, 1, + produce_q->kernel_if->num_pages, + FOLL_WRITE, produce_q->kernel_if->u.h.header_page); if (retval < (int)produce_q->kernel_if->num_pages) { pr_debug("get_user_pages_fast(produce) failed (retval=%d)", @@ -678,7 +679,8 @@ static int qp_host_get_user_memory(u64 produce_uva, } retval = get_user_pages_fast((uintptr_t) consume_uva, - consume_q->kernel_if->num_pages, 1, + consume_q->kernel_if->num_pages, + FOLL_WRITE, consume_q->kernel_if->u.h.header_page); if (retval < (int)consume_q->kernel_if->num_pages) { pr_debug("get_user_pages_fast(consume) failed (retval=%d)", diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c index 321bc673c417..cef0133aa47a 100644 --- a/drivers/platform/goldfish/goldfish_pipe.c +++ b/drivers/platform/goldfish/goldfish_pipe.c @@ -274,7 +274,8 @@ static int pin_user_pages(unsigned long first_page, *iter_last_page_size = last_page_size; } - ret = get_user_pages_fast(first_page, requested_pages, !is_write, + ret = get_user_pages_fast(first_page, requested_pages, + !is_write ? FOLL_WRITE : 0, pages); if (ret <= 0) return -EFAULT; diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c index cbe467ff1aba..f681b3e9e970 100644 --- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -868,7 +868,9 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode, pinned = get_user_pages_fast( (unsigned long)xfer->loc_addr & PAGE_MASK, - nr_pages, dir == DMA_FROM_DEVICE, page_list); + nr_pages, + dir == DMA_FROM_DEVICE ? FOLL_WRITE : 0, + page_list); if (pinned != nr_pages) { if (pinned < 0) { diff --git a/drivers/sbus/char/oradax.c b/drivers/sbus/char/oradax.c index 6516bc3cb58b..790aa148670d 100644 --- a/drivers/sbus/char/oradax.c +++ b/drivers/sbus/char/oradax.c @@ -437,7 +437,7 @@ static int dax_lock_page(void *va, struct page **p) dax_dbg("uva %p", va); - ret = get_user_pages_fast((unsigned long)va, 1, 1, p); + ret = get_user_pages_fast((unsigned long)va, 1, FOLL_WRITE, p); if (ret == 1) { dax_dbg("locked page %p, for VA %p", *p, va); return 0; diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 7ff22d3f03e3..871b25914c07 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -4918,7 +4918,8 @@ static int sgl_map_user_pages(struct st_buffer *STbp, /* Try to fault in all of the necessary pages */ /* rw==READ means read from drive, write into memory area */ - res = get_user_pages_fast(uaddr, nr_pages, rw == READ, pages); + res = get_user_pages_fast(uaddr, nr_pages, rw == READ ? FOLL_WRITE : 0, + pages); /* Errors and no page mapped should return here */ if (res < nr_pages) diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c index 26755d9ca41d..f67fdf1d3817 100644 --- a/drivers/staging/gasket/gasket_page_table.c +++ b/drivers/staging/gasket/gasket_page_table.c @@ -486,8 +486,8 @@ static int gasket_perform_mapping(struct gasket_page_table *pg_tbl, ptes[i].dma_addr = pg_tbl->coherent_pages[0].paddr + off + i * PAGE_SIZE; } else { - ret = get_user_pages_fast(page_addr - offset, 1, 1, - &page); + ret = get_user_pages_fast(page_addr - offset, 1, + FOLL_WRITE, &page); if (ret <= 0) { dev_err(pg_tbl->device, diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index 0b9ab1d0dd45..49fd7312e2aa 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -273,7 +273,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, goto err; } - rc = get_user_pages_fast(start, num_pages, 1, shm->pages); + rc = get_user_pages_fast(start, num_pages, FOLL_WRITE, shm->pages); if (rc > 0) shm->num_pages = rc; if (rc != num_pages) { diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c index c424913324e3..a4b10bb4086b 100644 --- a/drivers/vfio/vfio_iommu_spapr_tce.c +++ b/drivers/vfio/vfio_iommu_spapr_tce.c @@ -532,7 +532,8 @@ static int tce_iommu_use_page(unsigned long tce, unsigned long *hpa) enum dma_data_direction direction = iommu_tce_direction(tce); if (get_user_pages_fast(tce & PAGE_MASK, 1, - direction != DMA_TO_DEVICE, &page) != 1) + direction != DMA_TO_DEVICE ? FOLL_WRITE : 0, + &page) != 1) return -EFAULT; *hpa = __pa((unsigned long) page_address(page)); diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 24a129fcdd61..72685b1659ff 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1700,7 +1700,7 @@ static int set_bit_to_user(int nr, void __user *addr) int bit = nr + (log % PAGE_SIZE) * 8; int r; - r = get_user_pages_fast(log, 1, 1, &page); + r = get_user_pages_fast(log, 1, FOLL_WRITE, &page); if (r < 0) return r; BUG_ON(r != 1); diff --git a/drivers/video/fbdev/pvr2fb.c b/drivers/video/fbdev/pvr2fb.c index 8a53d1de611d..41390c8e0f67 100644 --- a/drivers/video/fbdev/pvr2fb.c +++ b/drivers/video/fbdev/pvr2fb.c @@ -686,7 +686,7 @@ static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, if (!pages) return -ENOMEM; - ret = get_user_pages_fast((unsigned long)buf, nr_pages, true, pages); + ret = get_user_pages_fast((unsigned long)buf, nr_pages, FOLL_WRITE, pages); if (ret < nr_pages) { nr_pages = ret; ret = -EINVAL; diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c index 8ba726e600e9..6446bcab4185 100644 --- a/drivers/virt/fsl_hypervisor.c +++ b/drivers/virt/fsl_hypervisor.c @@ -244,7 +244,7 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) /* Get the physical addresses of the source buffer */ num_pinned = get_user_pages_fast(param.local_vaddr - lb_offset, - num_pages, param.source != -1, pages); + num_pages, param.source != -1 ? FOLL_WRITE : 0, pages); if (num_pinned != num_pages) { /* get_user_pages() failed */ diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index 5efc5eee9544..7b47f1e6aab4 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -852,7 +852,7 @@ static int gntdev_get_page(struct gntdev_copy_batch *batch, void __user *virt, unsigned long xen_pfn; int ret; - ret = get_user_pages_fast(addr, 1, writeable, &page); + ret = get_user_pages_fast(addr, 1, writeable ? FOLL_WRITE : 0, &page); if (ret < 0) return ret; diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c index 443bcd8c3c19..5a7c4fda682f 100644 --- a/fs/orangefs/orangefs-bufmap.c +++ b/fs/orangefs/orangefs-bufmap.c @@ -269,7 +269,7 @@ orangefs_bufmap_map(struct orangefs_bufmap *bufmap, /* map the pages */ ret = get_user_pages_fast((unsigned long)user_desc->ptr, - bufmap->page_count, 1, bufmap->page_array); + bufmap->page_count, FOLL_WRITE, bufmap->page_array); if (ret < 0) return ret; diff --git a/include/linux/mm.h b/include/linux/mm.h index 05a105d9d4c3..8e1f3cd7482a 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1537,8 +1537,8 @@ long get_user_pages_locked(unsigned long start, unsigned long nr_pages, long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages, struct page **pages, unsigned int gup_flags); -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages); +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages); /* Container for pinned pfns / pages */ struct frame_vector { diff --git a/kernel/futex.c b/kernel/futex.c index fdd312da0992..e10209946f8b 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -546,7 +546,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a if (unlikely(should_fail_futex(fshared))) return -EFAULT; - err = get_user_pages_fast(address, 1, 1, &page); + err = get_user_pages_fast(address, 1, FOLL_WRITE, &page); /* * If write access is not required (eg. FUTEX_WAIT), try * and get read-only access. diff --git a/lib/iov_iter.c b/lib/iov_iter.c index be4bd627caf0..6dbae0692719 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -1280,7 +1280,9 @@ ssize_t iov_iter_get_pages(struct iov_iter *i, len = maxpages * PAGE_SIZE; addr &= ~(PAGE_SIZE - 1); n = DIV_ROUND_UP(len, PAGE_SIZE); - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, pages); + res = get_user_pages_fast(addr, n, + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, + pages); if (unlikely(res < 0)) return res; return (res == n ? len : res * PAGE_SIZE) - *start; @@ -1361,7 +1363,8 @@ ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, p = get_pages_array(n); if (!p) return -ENOMEM; - res = get_user_pages_fast(addr, n, iov_iter_rw(i) != WRITE, p); + res = get_user_pages_fast(addr, n, + iov_iter_rw(i) != WRITE ? FOLL_WRITE : 0, p); if (unlikely(res < 0)) { kvfree(p); return res; diff --git a/mm/gup.c b/mm/gup.c index 681388236106..6f32d36b3c5b 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -1863,7 +1863,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -1875,8 +1875,8 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, * requested. If nr_pages is 0 or negative, returns 0. If no pages * were pinned, returns -errno. */ -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) +int get_user_pages_fast(unsigned long start, int nr_pages, + unsigned int gup_flags, struct page **pages) { unsigned long addr, len, end; int nr = 0, ret = 0; @@ -1894,7 +1894,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, if (gup_fast_permitted(start, nr_pages)) { local_irq_disable(); - gup_pgd_range(addr, end, write ? FOLL_WRITE : 0, pages, &nr); + gup_pgd_range(addr, end, gup_flags, pages, &nr); local_irq_enable(); ret = nr; } @@ -1905,7 +1905,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write, pages += nr; ret = get_user_pages_unlocked(start, nr_pages - nr, pages, - write ? FOLL_WRITE : 0); + gup_flags); /* Have to be a bit careful with return values */ if (nr > 0) { diff --git a/mm/util.c b/mm/util.c index 1ea055138043..01ffe145c62b 100644 --- a/mm/util.c +++ b/mm/util.c @@ -306,7 +306,7 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); * get_user_pages_fast() - pin user pages in memory * @start: starting user address * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to + * @gup_flags: flags modifying pin behaviour * @pages: array that receives pointers to the pages pinned. * Should be at least nr_pages long. * @@ -327,10 +327,10 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast); * get_user_pages_fast simply falls back to get_user_pages. */ int __weak get_user_pages_fast(unsigned long start, - int nr_pages, int write, struct page **pages) + int nr_pages, unsigned int gup_flags, + struct page **pages) { - return get_user_pages_unlocked(start, nr_pages, pages, - write ? FOLL_WRITE : 0); + return get_user_pages_unlocked(start, nr_pages, pages, gup_flags); } EXPORT_SYMBOL_GPL(get_user_pages_fast); diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c index d3736f5bffec..74cafc0142ea 100644 --- a/net/ceph/pagevec.c +++ b/net/ceph/pagevec.c @@ -27,7 +27,7 @@ struct page **ceph_get_direct_page_vector(const void __user *data, while (got < num_pages) { rc = get_user_pages_fast( (unsigned long)data + ((unsigned long)got * PAGE_SIZE), - num_pages - got, write_page, pages + got); + num_pages - got, write_page ? FOLL_WRITE : 0, pages + got); if (rc < 0) break; BUG_ON(rc == 0); diff --git a/net/rds/info.c b/net/rds/info.c index e367a97a18c8..03f6fd56d237 100644 --- a/net/rds/info.c +++ b/net/rds/info.c @@ -193,7 +193,7 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval, ret = -ENOMEM; goto out; } - ret = get_user_pages_fast(start, nr_pages, 1, pages); + ret = get_user_pages_fast(start, nr_pages, FOLL_WRITE, pages); if (ret != nr_pages) { if (ret > 0) nr_pages = ret; diff --git a/net/rds/rdma.c b/net/rds/rdma.c index 182ab8430594..b340ed4fc43a 100644 --- a/net/rds/rdma.c +++ b/net/rds/rdma.c @@ -158,7 +158,8 @@ static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages, { int ret; - ret = get_user_pages_fast(user_addr, nr_pages, write, pages); + ret = get_user_pages_fast(user_addr, nr_pages, write ? FOLL_WRITE : 0, + pages); if (ret >= 0 && ret < nr_pages) { while (ret--)