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See http://www.infradead.org/rpr.html X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 X-loop: dm-devel@redhat.com Cc: nvdimm@lists.linux.dev, Mike Snitzer , linux-s390@vger.kernel.org, linux-erofs@lists.ozlabs.org, virtualization@lists.linux-foundation.org, linux-xfs@vger.kernel.org, dm-devel@redhat.com, "Darrick J . Wong" , linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, Ira Weiny Subject: [dm-devel] [PATCH 13/29] fsdax: use a saner calling convention for copy_cow_page_dax X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Just pass the vm_fault and iomap_iter structures, and figure out the rest locally. Note that this requires moving dax_iomap_sector up in the file. Signed-off-by: Christoph Hellwig Reviewed-by: Dan Williams Reviewed-by: Darrick J. Wong --- fs/dax.c | 29 +++++++++++++---------------- 1 file changed, 13 insertions(+), 16 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 73bd1439d8089..e51b4129d1b65 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -709,26 +709,31 @@ int dax_invalidate_mapping_entry_sync(struct address_space *mapping, return __dax_invalidate_entry(mapping, index, false); } -static int copy_cow_page_dax(struct block_device *bdev, struct dax_device *dax_dev, - sector_t sector, struct page *to, unsigned long vaddr) +static sector_t dax_iomap_sector(const struct iomap *iomap, loff_t pos) { + return (iomap->addr + (pos & PAGE_MASK) - iomap->offset) >> 9; +} + +static int copy_cow_page_dax(struct vm_fault *vmf, const struct iomap_iter *iter) +{ + sector_t sector = dax_iomap_sector(&iter->iomap, iter->pos); void *vto, *kaddr; pgoff_t pgoff; long rc; int id; - rc = bdev_dax_pgoff(bdev, sector, PAGE_SIZE, &pgoff); + rc = bdev_dax_pgoff(iter->iomap.bdev, sector, PAGE_SIZE, &pgoff); if (rc) return rc; id = dax_read_lock(); - rc = dax_direct_access(dax_dev, pgoff, 1, &kaddr, NULL); + rc = dax_direct_access(iter->iomap.dax_dev, pgoff, 1, &kaddr, NULL); if (rc < 0) { dax_read_unlock(id); return rc; } - vto = kmap_atomic(to); - copy_user_page(vto, kaddr, vaddr, to); + vto = kmap_atomic(vmf->cow_page); + copy_user_page(vto, kaddr, vmf->address, vmf->cow_page); kunmap_atomic(vto); dax_read_unlock(id); return 0; @@ -1005,11 +1010,6 @@ int dax_writeback_mapping_range(struct address_space *mapping, } EXPORT_SYMBOL_GPL(dax_writeback_mapping_range); -static sector_t dax_iomap_sector(const struct iomap *iomap, loff_t pos) -{ - return (iomap->addr + (pos & PAGE_MASK) - iomap->offset) >> 9; -} - static int dax_iomap_pfn(const struct iomap *iomap, loff_t pos, size_t size, pfn_t *pfnp) { @@ -1332,19 +1332,16 @@ static vm_fault_t dax_fault_synchronous_pfnp(pfn_t *pfnp, pfn_t pfn) static vm_fault_t dax_fault_cow_page(struct vm_fault *vmf, const struct iomap_iter *iter) { - sector_t sector = dax_iomap_sector(&iter->iomap, iter->pos); - unsigned long vaddr = vmf->address; vm_fault_t ret; int error = 0; switch (iter->iomap.type) { case IOMAP_HOLE: case IOMAP_UNWRITTEN: - clear_user_highpage(vmf->cow_page, vaddr); + clear_user_highpage(vmf->cow_page, vmf->address); break; case IOMAP_MAPPED: - error = copy_cow_page_dax(iter->iomap.bdev, iter->iomap.dax_dev, - sector, vmf->cow_page, vaddr); + error = copy_cow_page_dax(vmf, iter); break; default: WARN_ON_ONCE(1);