memcg_lib.sh: cosmetic fix for orig_memory_use_hierarchy variable

Signed-off-by Xiao Yang <[email protected]>

---
 testcases/kernel/controllers/memcg/functional/memcg_lib.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

testcases/kernel/controllers/memcg/functional/memcg_lib.sh +1 -1

index b785fe3..d4724c3 100755
@@ -506,7 +506,7 @@ setup_test()
 	# while there are distributions (RHEL7U0Beta for example) that sets
 	# it to 1.
 	orig_memory_use_hierarchy=$(cat /dev/memcg/memory.use_hierarchy)
-	if [ -z "orig_memory_use_hierarchy" ];then
+	if [ -z "$orig_memory_use_hierarchy" ];then
 		tst_resm TINFO "cat /dev/memcg/memory.use_hierarchy failed"
 	elif [ "$orig_memory_use_hierarchy" = "0" ];then
 		orig_memory_use_hierarchy=""