mm/slub: add missing annotation for put_map()

Sparse reports a warning at put_map()()

 warning: context imbalance in put_map() - unexpected unlock

The root cause is the missing annotation at put_map()
Add the missing __releases(&object_map_lock) annotation

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200214204741.94112-10-jbi.octave@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/slub.c b/mm/slub.c
index c6d603648c791b0a1429ee3070ae26cc9a119844..332d4b459a907b6a25e8fef7452e26c61604c2ea 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -466,7 +466,7 @@ static unsigned long *get_map(struct kmem_cache *s, struct page *page)
        return object_map;
 }
 
-static void put_map(unsigned long *map)
+static void put_map(unsigned long *map) __releases(&object_map_lock)
 {
        VM_BUG_ON(map != object_map);
        lockdep_assert_held(&object_map_lock);