mm: change direct call of spin_lock(anon_vma->lock) to inline function

Subsitute a direct call of spin_lock(anon_vma->lock) with an inline
function doing exactly the same.

This makes it easier to do the substitution to the root anon_vma lock in a
following patch.

We will deal with the handful of special locks (nested, dec_and_lock, etc)
separately.

Signed-off-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Tested-by: Larry Woodman <lwoodman@redhat.com>
Acked-by: Larry Woodman <lwoodman@redhat.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/mmap.c b/mm/mmap.c
index e26f1ea7c904..f5db18decc2e 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2593,7 +2593,7 @@ static void vm_unlock_anon_vma(struct anon_vma *anon_vma)
                 if (!__test_and_clear_bit(0, (unsigned long *)
                                           &anon_vma->head.next))
                         BUG();
-                spin_unlock(&anon_vma->lock);
+                anon_vma_unlock(anon_vma);
         }
 }