From: Vladimir Davydov <vdavydov@parallels.com>
Date: Thu, 26 Jun 2014 00:42:39 +0000 (+1000)
Subject: page-cgroup: fix flags definition
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ed84eeb37179afb873584ecf14afe7cf0c43893c;p=karo-tx-linux.git

page-cgroup: fix flags definition

Since commit a9ce315aaec1f ("mm: memcontrol: rewrite uncharge API"),
PCG_* flags are used as bit masks, but they are still defined in a enum
as bit numbers. Fix it.

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
index 97b5c39a31c8..9bfb8e68a595 100644
--- a/include/linux/page_cgroup.h
+++ b/include/linux/page_cgroup.h
@@ -3,9 +3,9 @@
 
 enum {
 	/* flags for mem_cgroup */
-	PCG_USED,	/* This page is charged to a memcg */
-	PCG_MEM,	/* This page holds a memory charge */
-	PCG_MEMSW,	/* This page holds a memory+swap charge */
+	PCG_USED = 0x01,	/* This page is charged to a memcg */
+	PCG_MEM = 0x02,		/* This page holds a memory charge */
+	PCG_MEMSW = 0x04,	/* This page holds a memory+swap charge */
 	__NR_PCG_FLAGS,
 };
 
@@ -46,7 +46,7 @@ struct page *lookup_cgroup_page(struct page_cgroup *pc);
 
 static inline int PageCgroupUsed(struct page_cgroup *pc)
 {
-	return test_bit(PCG_USED, &pc->flags);
+	return !!(pc->flags & PCG_USED);
 }
 
 #else /* CONFIG_MEMCG */