From: Suren Baghdasaryan <surenb@google.com>
Date: Fri, 4 Aug 2023 08:27:20 -0700
Subject: mm: for !CONFIG_PER_VMA_LOCK equate write lock assertion for vma and
 mmap
Git-commit: ce2fc5fffdfa9fc1412aff108afa102ddf82fd2b
Patch-mainline: v6.6-rc1
References: bsc#1219558

When CONFIG_PER_VMA_LOCK=n, vma_assert_write_locked() should be equivalent
to mmap_assert_write_locked().

Link: https://lkml.kernel.org/r/20230804152724.3090321-3-surenb@google.com
Suggested-by: Jann Horn <jannh@google.com>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Linus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
 include/linux/mm.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -756,7 +756,8 @@ static inline void vma_end_read(struct v
 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) {}