oom: fix oom04/5 Warning

To get rid of the warnings, do nothing in cleanup() if NUMA node is less than 1.

oom04.c:61: CONF: requires NUMA with at least 1 node mem.c:854: INFO: set overcommit_memory to 0 mem.c:761: WARN: open /dev/cpuset/tasks: ENOENT mem.c:766: WARN: fopen /dev/cpuset/1/tasks: ENOENT mem.c:778: WARN: rmdir /dev/cpuset/1: ENOENT mem.c:780: WARN: umount /dev/cpuset: ENOENT mem.c:782: WARN: rmdir /dev/cpuset: ENOENT

oom05.c:84: CONF: requires NUMA with at least 1 node mem.c:854: INFO: set overcommit_memory to 0 mem.c:761: WARN: open /dev/cpuset/tasks: ENOENT mem.c:766: WARN: fopen /dev/cpuset/1/tasks: ENOENT mem.c:778: WARN: rmdir /dev/cpuset/1: ENOENT mem.c:780: WARN: umount /dev/cpuset: ENOENT mem.c:782: WARN: rmdir /dev/cpuset: ENOENT mem.c:761: WARN: open /dev/cgroup/tasks: ENOENT mem.c:766: WARN: fopen /dev/cgroup/1/tasks: ENOENT mem.c:778: WARN: rmdir /dev/cgroup/1: ENOENT mem.c:780: WARN: umount /dev/cgroup: ENOENT mem.c:782: WARN: rmdir /dev/cgroup: ENOENT

---
 testcases/kernel/mem/oom/oom04.c | 3 +++
 testcases/kernel/mem/oom/oom05.c | 3 +++
 2 files changed, 6 insertions(+)

index e4e70e2..6da690a 100644
@@ -80,6 +80,9 @@ static void setup(void)
 
 static void cleanup(void)
 {
+	if (!is_numa(NULL, NH_MEMS, 1))
+		return;
+
 	set_sys_tune("overcommit_memory", overcommit, 0);
 	umount_mem(CPATH, CPATH_NEW);
 }

index bdf5d19..d874cc5 100644
@@ -105,6 +105,9 @@ void setup(void)
 
 void cleanup(void)
 {
+	if (!is_numa(NULL, NH_MEMS, 1))
+		return;
+
 	set_sys_tune("overcommit_memory", overcommit, 0);
 	umount_mem(CPATH, CPATH_NEW);
 	umount_mem(MEMCG_PATH, MEMCG_PATH_NEW);

2.9.3