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 <[email protected]>
---
 include/linux/page_cgroup.h |   12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
index fb60e4a466c0..9065a61345a1 100644
--- a/include/linux/page_cgroup.h
+++ b/include/linux/page_cgroup.h
@@ -1,12 +1,10 @@
 #ifndef __LINUX_PAGE_CGROUP_H
 #define __LINUX_PAGE_CGROUP_H
 
-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 */
-};
+/* flags for mem_cgroup */
+#define PCG_USED       0x01    /* This page is charged to a memcg */
+#define PCG_MEM                0x02    /* This page holds a memory charge */
+#define PCG_MEMSW      0x04    /* This page holds a memory+swap charge */
 
 struct pglist_data;
 
@@ -44,7 +42,7 @@ 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 */
 struct page_cgroup;
-- 
1.7.10.4

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