| Message ID | 20220624044339.1533882-2-anshuman.khandual@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mm/mmap: Drop __SXXX/__PXXX macros from across platforms | expand |
Looks good:
Reviewed-by: Christoph Hellwig <hch@lst.de>
Le 24/06/2022 à 06:43, Anshuman Khandual a écrit : > Build protect generic protection_map[] array with __P000, so that it can be > moved inside all the platforms one after the other. Otherwise there will be > build failures during this process. CONFIG_ARCH_HAS_VM_GET_PAGE_PROT cannot > be used for this purpose as only certain platforms enable this config now. > > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: linux-mm@kvack.org > Cc: linux-kernel@vger.kernel.org > Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu> > Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> > --- > include/linux/mm.h | 2 ++ > mm/mmap.c | 2 ++ > 2 files changed, 4 insertions(+) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index bc8f326be0ce..47bfe038d46e 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -424,7 +424,9 @@ extern unsigned int kobjsize(const void *objp); > * mapping from the currently active vm_flags protection bits (the > * low four bits) to a page protection mask.. > */ > +#ifdef __P000 > extern pgprot_t protection_map[16]; > +#endif > > /* > * The default fault flags that should be used by most of the > diff --git a/mm/mmap.c b/mm/mmap.c > index 61e6135c54ef..b01f0280bda2 100644 > --- a/mm/mmap.c > +++ b/mm/mmap.c > @@ -101,6 +101,7 @@ static void unmap_region(struct mm_struct *mm, > * w: (no) no > * x: (yes) yes > */ > +#ifdef __P000 > pgprot_t protection_map[16] __ro_after_init = { > [VM_NONE] = __P000, > [VM_READ] = __P001, > @@ -119,6 +120,7 @@ pgprot_t protection_map[16] __ro_after_init = { > [VM_SHARED | VM_EXEC | VM_WRITE] = __S110, > [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = __S111 > }; > +#endif > > #ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT > pgprot_t vm_get_page_prot(unsigned long vm_flags)
diff --git a/include/linux/mm.h b/include/linux/mm.h index bc8f326be0ce..47bfe038d46e 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -424,7 +424,9 @@ extern unsigned int kobjsize(const void *objp); * mapping from the currently active vm_flags protection bits (the * low four bits) to a page protection mask.. */ +#ifdef __P000 extern pgprot_t protection_map[16]; +#endif /* * The default fault flags that should be used by most of the diff --git a/mm/mmap.c b/mm/mmap.c index 61e6135c54ef..b01f0280bda2 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -101,6 +101,7 @@ static void unmap_region(struct mm_struct *mm, * w: (no) no * x: (yes) yes */ +#ifdef __P000 pgprot_t protection_map[16] __ro_after_init = { [VM_NONE] = __P000, [VM_READ] = __P001, @@ -119,6 +120,7 @@ pgprot_t protection_map[16] __ro_after_init = { [VM_SHARED | VM_EXEC | VM_WRITE] = __S110, [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = __S111 }; +#endif #ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT pgprot_t vm_get_page_prot(unsigned long vm_flags)
Build protect generic protection_map[] array with __P000, so that it can be moved inside all the platforms one after the other. Otherwise there will be build failures during this process. CONFIG_ARCH_HAS_VM_GET_PAGE_PROT cannot be used for this purpose as only certain platforms enable this config now. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> --- include/linux/mm.h | 2 ++ mm/mmap.c | 2 ++ 2 files changed, 4 insertions(+)