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-rw-r--r--kernel/cgroup.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index e801ecfa36ef..2d3a132e881d 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1325,11 +1325,11 @@ static void drop_parsed_module_refcounts(unsigned long subsys_mask)
struct cgroup_subsys *ss;
int i;
- for_each_subsys(ss, i) {
- if (!(subsys_mask & (1UL << i)))
- continue;
- module_put(cgroup_subsys[i]->module);
- }
+ mutex_lock(&cgroup_mutex);
+ for_each_subsys(ss, i)
+ if (subsys_mask & (1UL << i))
+ module_put(cgroup_subsys[i]->module);
+ mutex_unlock(&cgroup_mutex);
}
static int cgroup_remount(struct super_block *sb, int *flags, char *data)