From: Mel Gorman <mgorman@suse.de>
Date: Wed, 4 Jun 2014 23:10:26 +0000 (-0700)
Subject: mm: do not use atomic operations when releasing pages
X-Git-Tag: v3.14.31~19
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d065df14f73b74f173e2540591185a69e0a55749;p=thirdparty%2Fkernel%2Fstable.git

mm: do not use atomic operations when releasing pages

commit e3741b506c5088fa8c911bb5884c430f770fb49d upstream.

There should be no references to it any more and a parallel mark should
not be reordered against us.  Use non-locked varient to clear page active.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Jan Kara <jack@suse.cz>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/mm/swap.c b/mm/swap.c
index d2445819fa585..c370e59245f9f 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -867,7 +867,7 @@ void release_pages(struct page **pages, int nr, bool cold)
 		}
 
 		/* Clear Active bit in case of parallel mark_page_accessed */
-		ClearPageActive(page);
+		__ClearPageActive(page);
 
 		list_add(&page->lru, &pages_to_free);
 	}