diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 1151e93d71b65c73a2e552cb17a79df84b198374..f0decd8165e7927c42a6d5989d5819d47e263cd7 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2109,10 +2109,8 @@ static int cpuset_can_attach(struct cgroup_taskset *tset)
 static void cpuset_cancel_attach(struct cgroup_taskset *tset)
 {
 	struct cgroup_subsys_state *css;
-	struct cpuset *cs;
 
 	cgroup_taskset_first(tset, &css);
-	cs = css_cs(css);
 
 	mutex_lock(&cpuset_mutex);
 	css_cs(css)->attach_in_progress--;