linux-kernel - [PATCH] Handling of unused variable 'do-numainfo on compilation time

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Date:	Fri,  3 Feb 2012 17:43:47 +0900
From:	Geunsik Lim <geunsik.lim@...il.com>
To:	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	linux-mm <linux-mm@...ck.org>
Subject: [PATCH] Handling of unused variable 'do-numainfo on compilation time

Actually, Usage of the variable 'do_numainfo'is not suitable for gcc compiler.
Declare the variable 'do_numainfo' if the number of NUMA nodes > 1.

Signed-off-by: Geunsik Lim <geunsik.lim@...sung.com>
---
 mm/memcontrol.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 556859f..4e17ac5 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -776,7 +776,10 @@ static void memcg_check_events(struct mem_cgroup *memcg, struct page *page)
 	/* threshold event is triggered in finer grain than soft limit */
 	if (unlikely(mem_cgroup_event_ratelimit(memcg,
 						MEM_CGROUP_TARGET_THRESH))) {
-		bool do_softlimit, do_numainfo;
+		bool do_softlimit;
+#if MAX_NUMNODES > 1
+                bool do_numainfo;
+#endif
 
 		do_softlimit = mem_cgroup_event_ratelimit(memcg,
 						MEM_CGROUP_TARGET_SOFTLIMIT);
-- 
1.7.8.1

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