linux-kernel - [PATCH 1/5] mm: memcontrol: Remove redundant hot plug notifier test.

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Date:	Fri, 18 Mar 2016 22:26:07 +0100
From:	Richard Cochran <rcochran@...utronix.de>
To:	<linux-kernel@...r.kernel.org>
Cc:	<rt@...utronix.de>, Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...nel.org>,
	Vladimir Davydov <vdavydov@...tuozzo.com>,
	cgroups@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 1/5] mm: memcontrol: Remove redundant hot plug notifier test.

The test for ONLINE is redundant because the following test for !DEAD
already includes the online case.  This patch removes the superfluous
code.

Cc: Johannes Weiner <hannes@...xchg.org>
Cc: Michal Hocko <mhocko@...nel.org>
Cc: Vladimir Davydov <vdavydov@...tuozzo.com>
Cc: cgroups@...r.kernel.org
Cc: linux-mm@...ck.org
Signed-off-by: Richard Cochran <rcochran@...utronix.de>
---
 mm/memcontrol.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index d06cae2..993a261 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1916,9 +1916,6 @@ static int memcg_cpu_hotplug_callback(struct notifier_block *nb,
 	int cpu = (unsigned long)hcpu;
 	struct memcg_stock_pcp *stock;
 
-	if (action == CPU_ONLINE)
-		return NOTIFY_OK;
-
 	if (action != CPU_DEAD && action != CPU_DEAD_FROZEN)
 		return NOTIFY_OK;
 
-- 
2.1.4