linux-kernel - [PATCH 1/4] cpuset: Remove unneeded NODEMASK_ALLOC() in cpuset_sprintf

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Message-ID: <4D5C7EA7.1030409@cn.fujitsu.com>
Date:	Thu, 17 Feb 2011 09:49:27 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Paul Menage <menage@...gle.com>,
	David Rientjes <rientjes@...gle.com>,
	缪 勰 <miaox@...fujitsu.com>,
	linux-mm@...ck.org
Subject: [PATCH 1/4] cpuset: Remove unneeded NODEMASK_ALLOC() in cpuset_sprintf_memlist()

It's not necessary to copy cpuset->mems_allowed to a buffer
allocated by NODEMASK_ALLOC(). Just pass it to nodelist_scnprintf().

Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
 kernel/cpuset.c |   10 +---------
 1 files changed, 1 insertions(+), 9 deletions(-)

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 10f1835..f13ff2e 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1620,20 +1620,12 @@ static int cpuset_sprintf_cpulist(char *page, struct cpuset *cs)
 
 static int cpuset_sprintf_memlist(char *page, struct cpuset *cs)
 {
-	NODEMASK_ALLOC(nodemask_t, mask, GFP_KERNEL);
 	int retval;
 
-	if (mask == NULL)
-		return -ENOMEM;
-
 	mutex_lock(&callback_mutex);
-	*mask = cs->mems_allowed;
+	retval = nodelist_scnprintf(page, PAGE_SIZE, cs->mems_allowed);
 	mutex_unlock(&callback_mutex);
 
-	retval = nodelist_scnprintf(page, PAGE_SIZE, *mask);
-
-	NODEMASK_FREE(mask);
-
 	return retval;
 }
 
-- 
1.7.3.1
--
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