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| author |   Miaohe Lin <linmiaohe@huawei.com> | 2021-02-25 17:17:53 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-26 09:41:01 -0800 |
| commit | aaf1f990aee40bc74b425ef8f51201ae21b85ed7 (patch) | |
| tree | fb18395b3d4afa77173fe62a242331a24b55b802 /mm | |
| parent | mm/mlock: stop counting mlocked pages when none vma is found (diff) | |
| download | linux-dev-aaf1f990aee40bc74b425ef8f51201ae21b85ed7.tar.xz linux-dev-aaf1f990aee40bc74b425ef8f51201ae21b85ed7.zip | |
mm/rmap: correct some obsolete comments of anon_vma
commit 2b575eb64f7a ("mm: convert anon_vma->lock to a mutex") changed
spinlock used to serialize access to vma list to mutex. And further, the
commit 5a505085f043 ("mm/rmap: Convert the struct anon_vma::mutex to an
rwsem") converted the mutex to an rwsem for solving scalability problem.
So replace spinlock with rwsem to make comment uptodate.
Link: https://lkml.kernel.org/r/20210123072459.25903-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/rmap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index e26ae119a131..f6f43620cd97 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -168,7 +168,7 @@ static void anon_vma_chain_link(struct vm_area_struct *vma, * * Anon-vma allocations are very subtle, because we may have * optimistically looked up an anon_vma in page_lock_anon_vma_read() - * and that may actually touch the spinlock even in the newly + * and that may actually touch the rwsem even in the newly * allocated vma (it depends on RCU to make sure that the * anon_vma isn't actually destroyed). * @@ -359,7 +359,7 @@ int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma) goto out_error_free_anon_vma; /* - * The root anon_vma's spinlock is the lock actually used when we + * The root anon_vma's rwsem is the lock actually used when we * lock any of the anon_vmas in this anon_vma tree. */ anon_vma->root = pvma->anon_vma->root; |