linux-kernel - [patch 1/6] mm: memcg: remove obsolete statistics array boundary enum item

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Message-Id: <1337018451-27359-2-git-send-email-hannes@cmpxchg.org>
Date:	Mon, 14 May 2012 20:00:46 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michal Hocko <mhocko@...e.cz>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	cgroups@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [patch 1/6] mm: memcg: remove obsolete statistics array boundary enum item

MEM_CGROUP_STAT_DATA is a leftover from when item counters were living
in the same array as ever-increasing event counters.  It's no longer
needed, use MEM_CGROUP_STAT_NSTATS to iterate over the stat array.

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
 mm/memcontrol.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9520ee9..aef89c1 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -99,7 +99,6 @@ enum mem_cgroup_stat_index {
 	MEM_CGROUP_STAT_FILE_MAPPED,  /* # of pages charged as file rss */
 	MEM_CGROUP_STAT_MLOCK, /* # of pages charged as mlock()ed */
 	MEM_CGROUP_STAT_SWAPOUT, /* # of pages, swapped out */
-	MEM_CGROUP_STAT_DATA, /* end of data requires synchronization */
 	MEM_CGROUP_STAT_NSTATS,
 };
 
@@ -2158,7 +2157,7 @@ static void mem_cgroup_drain_pcp_counter(struct mem_cgroup *memcg, int cpu)
 	int i;
 
 	spin_lock(&memcg->pcp_counter_lock);
-	for (i = 0; i < MEM_CGROUP_STAT_DATA; i++) {
+	for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) {
 		long x = per_cpu(memcg->stat->count[i], cpu);
 
 		per_cpu(memcg->stat->count[i], cpu) = 0;
-- 
1.7.10.1

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