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-rw-r--r--kernel/cgroup.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 492215d67fa5..5a54ff42874e 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1115,8 +1115,10 @@ static void cgroup_kill_sb(struct super_block *sb) {
1115 } 1115 }
1116 write_unlock(&css_set_lock); 1116 write_unlock(&css_set_lock);
1117 1117
1118 list_del(&root->root_list); 1118 if (!list_empty(&root->root_list)) {
1119 root_count--; 1119 list_del(&root->root_list);
1120 root_count--;
1121 }
1120 1122
1121 mutex_unlock(&cgroup_mutex); 1123 mutex_unlock(&cgroup_mutex);
1122 1124