diff options
| author |   Suren Baghdasaryan <surenb@google.com> | 2023-02-27 09:36:12 -0800 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2023-04-05 20:02:57 -0700 |
| commit | c732293331a22187d59cd485879276a1da398387 (patch) | |
| tree | 3fe8f69f3c3a556054e0cbd5cf3ef54ba8516639 | |
| parent | mm: add per-VMA lock and helper functions to control it (diff) | |
| download | wireguard-linux-c732293331a22187d59cd485879276a1da398387.tar.xz wireguard-linux-c732293331a22187d59cd485879276a1da398387.zip | |
mm: mark VMA as being written when changing vm_flags
Updates to vm_flags have to be done with VMA marked as being written for
preventing concurrent page faults or other modifications.
Link: https://lkml.kernel.org/r/20230227173632.3292573-14-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/mm.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 53bfb42663ea..d0a6c99aba09 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -727,28 +727,28 @@ static inline void vm_flags_init(struct vm_area_struct *vma, static inline void vm_flags_reset(struct vm_area_struct *vma, vm_flags_t flags) { - mmap_assert_write_locked(vma->vm_mm); + vma_start_write(vma); vm_flags_init(vma, flags); } static inline void vm_flags_reset_once(struct vm_area_struct *vma, vm_flags_t flags) { - mmap_assert_write_locked(vma->vm_mm); + vma_start_write(vma); WRITE_ONCE(ACCESS_PRIVATE(vma, __vm_flags), flags); } static inline void vm_flags_set(struct vm_area_struct *vma, vm_flags_t flags) { - mmap_assert_write_locked(vma->vm_mm); + vma_start_write(vma); ACCESS_PRIVATE(vma, __vm_flags) |= flags; } static inline void vm_flags_clear(struct vm_area_struct *vma, vm_flags_t flags) { - mmap_assert_write_locked(vma->vm_mm); + vma_start_write(vma); ACCESS_PRIVATE(vma, __vm_flags) &= ~flags; } @@ -769,7 +769,7 @@ static inline void __vm_flags_mod(struct vm_area_struct *vma, static inline void vm_flags_mod(struct vm_area_struct *vma, vm_flags_t set, vm_flags_t clear) { - mmap_assert_write_locked(vma->vm_mm); + vma_start_write(vma); __vm_flags_mod(vma, set, clear); } |