Re: [PATCH v2 02/13] mm: rename vma_flag_test/set_atomic() to vma_test/set_atomic_flag()

Liam R. Howlett
2026-02-09T18:42:31Z

* Lorenzo Stoakes <lorenzo.stoakes@oracle.com> [260122 16:06]:
> In order to stay consistent between functions which manipulate a vm_flags_t
> argument of the form of vma_flags_...() and those which manipulate a
> VMA (in this case the flags field of a VMA), rename
> vma_flag_[test/set]_atomic() to vma_[test/set]_atomic_flag().
>
> This lays the groundwork for adding VMA flag manipulation functions in a
> subsequent commit.
>
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>

Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>

> ---
> include/linux/mm.h | 13 +++++--------
> mm/khugepaged.c | 2 +-
> mm/madvise.c | 2 +-
> 3 files changed, 7 insertions(+), 10 deletions(-)
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 776a7e03f88b..e0d31238097c 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -987,8 +987,7 @@ static inline void vm_flags_mod(struct vm_area_struct *vma,
> __vm_flags_mod(vma, set, clear);
> }
>
> -static inline bool __vma_flag_atomic_valid(struct vm_area_struct *vma,
> - vma_flag_t bit)
> +static inline bool __vma_atomic_valid_flag(struct vm_area_struct *vma, vma_flag_t bit)
> {
> const vm_flags_t mask = BIT((__force int)bit);
>
> @@ -1003,13 +1002,12 @@ static inline bool __vma_flag_atomic_valid(struct vm_area_struct *vma,
> * Set VMA flag atomically. Requires only VMA/mmap read lock. Only specific
> * valid flags are allowed to do this.
> */
> -static inline void vma_flag_set_atomic(struct vm_area_struct *vma,
> - vma_flag_t bit)
> +static inline void vma_set_atomic_flag(struct vm_area_struct *vma, vma_flag_t bit)
> {
> unsigned long *bitmap = vma->flags.__vma_flags;
>
> vma_assert_stabilised(vma);
> - if (__vma_flag_atomic_valid(vma, bit))
> + if (__vma_atomic_valid_flag(vma, bit))
> set_bit((__force int)bit, bitmap);
> }
>
> @@ -1020,10 +1018,9 @@ static inline void vma_flag_set_atomic(struct vm_area_struct *vma,
> * This is necessarily racey, so callers must ensure that serialisation is
> * achieved through some other means, or that races are permissible.
> */
> -static inline bool vma_flag_test_atomic(struct vm_area_struct *vma,
> - vma_flag_t bit)
> +static inline bool vma_test_atomic_flag(struct vm_area_struct *vma, vma_flag_t bit)
> {
> - if (__vma_flag_atomic_valid(vma, bit))
> + if (__vma_atomic_valid_flag(vma, bit))
> return test_bit((__force int)bit, &vma->vm_flags);
>
> return false;
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index fba6aea5bea6..e76f42243534 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -1741,7 +1741,7 @@ static bool file_backed_vma_is_retractable(struct vm_area_struct *vma)
> * obtained on guard region installation after the flag is set, so this
> * check being performed under this lock excludes races.
> */
> - if (vma_flag_test_atomic(vma, VMA_MAYBE_GUARD_BIT))
> + if (vma_test_atomic_flag(vma, VMA_MAYBE_GUARD_BIT))
> return false;
>
> return true;
> diff --git a/mm/madvise.c b/mm/madvise.c
> index 1f3040688f04..8debb2d434aa 100644
> --- a/mm/madvise.c
> +++ b/mm/madvise.c
> @@ -1140,7 +1140,7 @@ static long madvise_guard_install(struct madvise_behavior *madv_behavior)
> * acquire an mmap/VMA write lock to read it. All remaining readers may
> * or may not see the flag set, but we don't care.
> */
> - vma_flag_set_atomic(vma, VMA_MAYBE_GUARD_BIT);
> + vma_set_atomic_flag(vma, VMA_MAYBE_GUARD_BIT);
>
> /*
> * If anonymous and we are establishing page tables the VMA ought to
> --
> 2.52.0
>