linux-kernel - [patch] sched/numa: checking for NULL instead of IS

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Message-ID: <20120522145233.GA17419@elgon.mountain>
Date:	Tue, 22 May 2012 17:52:34 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] sched/numa: checking for NULL instead of IS_ERR()

If mpol_new() is called with MPOL_BIND then it can't return a NULL
pointer.  We should be checking IS_ERR() here.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/kernel/sched/numa.c b/kernel/sched/numa.c
index 1149993..36d27ac 100644
--- a/kernel/sched/numa.c
+++ b/kernel/sched/numa.c
@@ -1481,9 +1481,9 @@ SYSCALL_DEFINE4(numa_mbind, unsigned long, addr, unsigned long, len,
 
 	mask = nodemask_of_node(ng->numa_entity.node);
 	mpol = mpol_new(MPOL_BIND, 0, &mask);
-	if (!mpol) {
+	if (IS_ERR(mpol)) {
 		ng_put(ng);
-		return -ENOMEM;
+		return PTR_ERR(mpol);
 	}
 	mpol->flags |= MPOL_MF_LAZY;
 	mpol->numa_group = ng;
--
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