Re: [PATCH v2 2/6] mm: for !CONFIG_PER_VMA_LOCK equate write lock assertion for vma and mmap

[Liam R. Howlett]

* Suren Baghdasaryan <surenb@xxxxxxxxxx> [230801 18:07]:
> When CONFIG_PER_VMA_LOCK=n, vma_assert_write_locked() should be equivalent
> to mmap_assert_write_locked().
> 
> Suggested-by: Jann Horn <jannh@xxxxxxxxxx>
> Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>

Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>

> ---
>  include/linux/mm.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 406ab9ea818f..262b5f44101d 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -750,7 +750,8 @@ static inline void vma_end_read(struct vm_area_struct *vma) {}
>  static inline void vma_start_write(struct vm_area_struct *vma) {}
>  static inline bool vma_try_start_write(struct vm_area_struct *vma)
>  		{ return true; }
> -static inline void vma_assert_write_locked(struct vm_area_struct *vma) {}
> +static inline void vma_assert_write_locked(struct vm_area_struct *vma)
> +		{ mmap_assert_write_locked(vma->vm_mm); }
>  static inline void vma_mark_detached(struct vm_area_struct *vma,
>  				     bool detached) {}
>  
> -- 
> 2.41.0.585.gd2178a4bd4-goog
>