[patch] sched/numa: checking for NULL instead of IS_ERR()

[patch] sched/numa: checking for NULL instead of IS_ERR()

[Dan Carpenter]

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@oracle.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;

[tip:sched/numa] sched/numa: Checking for NULL instead of IS_ERR()

[tip-bot for Dan Carpenter]

Commit-ID:  63f82f66a208efe0f5f10ed5d0cd8d32c8dfd013
Gitweb:     http://git.kernel.org/tip/63f82f66a208efe0f5f10ed5d0cd8d32c8dfd013
Author:     Dan Carpenter <dan.carpenter@oracle.com>
AuthorDate: Tue, 22 May 2012 17:52:34 +0300
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 23 May 2012 17:11:31 +0200

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@oracle.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120522145233.GA17419@elgon.mountain
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/sched/numa.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/numa.c b/kernel/sched/numa.c
index de66256..25be2b1 100644
--- a/kernel/sched/numa.c
+++ b/kernel/sched/numa.c
@@ -1482,9 +1482,9 @@ 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;