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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2016-05-19 17:10:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-19 19:12:14 -0700
commit6d061f9f6136d477932088c24ce155d7dc785746 (patch)
tree826ccf493e5a9688bcb363fdc9c68705bf5ece1a /mm/filemap.c
parent43efd3ea64f3cf8920e8793e6953321a466023e3 (diff)
downloadlinux-6d061f9f6136d477932088c24ce155d7dc785746.tar.bz2
mm/page_ref: use page_ref helper instead of direct modification of _count
page_reference manipulation functions are introduced to track down reference count change of the page. Use it instead of direct modification of _count. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Sunil Goutham <sgoutham@cavium.com> Cc: Chris Metcalf <cmetcalf@mellanox.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/filemap.c')
-rw-r--r--mm/filemap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 182b21825255..01690338e3d2 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -213,7 +213,7 @@ void __delete_from_page_cache(struct page *page, void *shadow)
* some other bad page check should catch it later.
*/
page_mapcount_reset(page);
- atomic_sub(mapcount, &page->_count);
+ page_ref_sub(page, mapcount);
}
}