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authorJianguo Wu <wujianguo@huawei.com>2013-09-11 14:21:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-11 15:57:29 -0700
commit1da6f0e1b316d0215989fe4d7c657edead1fdea7 (patch)
tree0fe575f5181927218f9f2e9bd3dca571ec18445f /mm/mempolicy.c
parentaf0ed73e699bb0453603b1d1a4727377641b2096 (diff)
mm/mempolicy: return NULL if node is NUMA_NO_NODE in get_task_policy
If node == NUMA_NO_NODE, pol is NULL, we should return NULL instead of do "if (!pol->mode)" check. [akpm@linux-foundation.org: reorganise code] Signed-off-by: Jianguo Wu <wujianguo@huawei.com> Cc: Mel Gorman <mgorman@suse.de> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Rik van Riel <riel@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Hanjun Guo <guohanjun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 6b1d426731a..27022ca890f 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -123,16 +123,19 @@ static struct mempolicy preferred_node_policy[MAX_NUMNODES];
static struct mempolicy *get_task_policy(struct task_struct *p)
{
struct mempolicy *pol = p->mempolicy;
- int node;
if (!pol) {
- node = numa_node_id();
- if (node != NUMA_NO_NODE)
- pol = &preferred_node_policy[node];
+ int node = numa_node_id();
- /* preferred_node_policy is not initialised early in boot */
- if (!pol->mode)
- pol = NULL;
+ if (node != NUMA_NO_NODE) {
+ pol = &preferred_node_policy[node];
+ /*
+ * preferred_node_policy is not initialised early in
+ * boot
+ */
+ if (!pol->mode)
+ pol = NULL;
+ }
}
return pol;