Commit 631b0cfd authored by Yuanhan Liu's avatar Yuanhan Liu Committed by Linus Torvalds

mm: fix wrong comments about anon_vma lock

We use rwsem since commit 5a505085 ("mm/rmap: Convert the struct
anon_vma::mutex to an rwsem").  And most of comments are converted to
the new rwsem lock; while just 2 more missed from:

	 $ git grep 'anon_vma->mutex'
Signed-off-by: default avatarYuanhan Liu <yuanhan.liu@linux.intel.com>
Acked-by: default avatarIngo Molnar <mingo@kernel.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 249d9d9d
......@@ -151,7 +151,7 @@ struct mmu_notifier_ops {
* Therefore notifier chains can only be traversed when either
*
* 1. mmap_sem is held.
* 2. One of the reverse map locks is held (i_mmap_mutex or anon_vma->mutex).
* 2. One of the reverse map locks is held (i_mmap_mutex or anon_vma->rwsem).
* 3. No other concurrent thread can access the list (release)
*/
struct mmu_notifier {
......
......@@ -2943,7 +2943,7 @@ static void vm_lock_mapping(struct mm_struct *mm, struct address_space *mapping)
* vma in this mm is backed by the same anon_vma or address_space.
*
* We can take all the locks in random order because the VM code
* taking i_mmap_mutex or anon_vma->mutex outside the mmap_sem never
* taking i_mmap_mutex or anon_vma->rwsem outside the mmap_sem never
* takes more than one of them in a row. Secondly we're protected
* against a concurrent mm_take_all_locks() by the mm_all_locks_mutex.
*
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment