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-rw-r--r--kernel/cgroup/cgroup-internal.h1
-rw-r--r--kernel/cgroup/cgroup.c4
2 files changed, 2 insertions, 3 deletions
diff --git a/kernel/cgroup/cgroup-internal.h b/kernel/cgroup/cgroup-internal.h
index 6e36e854b512..5da09c74228d 100644
--- a/kernel/cgroup/cgroup-internal.h
+++ b/kernel/cgroup/cgroup-internal.h
@@ -12,7 +12,6 @@
#define TRACE_CGROUP_PATH_LEN 1024
extern spinlock_t trace_cgroup_path_lock;
extern char trace_cgroup_path[TRACE_CGROUP_PATH_LEN];
-extern bool cgroup_debug;
extern void __init enable_debug_cgroup(void);
/*
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index adb820e98f24..1779ccddb734 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -96,7 +96,7 @@ EXPORT_SYMBOL_GPL(css_set_lock);
DEFINE_SPINLOCK(trace_cgroup_path_lock);
char trace_cgroup_path[TRACE_CGROUP_PATH_LEN];
-bool cgroup_debug __read_mostly;
+static bool cgroup_debug __read_mostly;
/*
* Protects cgroup_idr and css_idr so that IDs can be released without
@@ -5685,7 +5685,7 @@ static int cgroup_destroy_locked(struct cgroup *cgrp)
css_clear_dir(&cgrp->self);
kernfs_remove(cgrp->kn);
- if (parent && cgroup_is_threaded(cgrp))
+ if (cgroup_is_threaded(cgrp))
parent->nr_threaded_children--;
spin_lock_irq(&css_set_lock);