cgroup/cpuset: no need to explicitly init a global static variable

cpuset_rwsem is a static variable defined with DEFINE_STATIC_PERCPU_RWSEM().
It's initialized at build time and so there's no need for explicit runtime
init leaking one percpu int.

Signed-off-by: Daniel Vacek <[email protected]>
Reviewed-by: Aaron Tomlin <[email protected]>
Acked-by: Mukesh Ojha <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

Author: Daniel Vacek

kernel/cgroup/cpuset.c

@@ -3281,8 +3281,6 @@ struct cgroup_subsys cpuset_cgrp_subsys = {
 
 int __init cpuset_init(void)
 {
-	BUG_ON(percpu_init_rwsem(&cpuset_rwsem));
-
 	BUG_ON(!alloc_cpumask_var(&top_cpuset.cpus_allowed, GFP_KERNEL));
 	BUG_ON(!alloc_cpumask_var(&top_cpuset.effective_cpus, GFP_KERNEL));
 	BUG_ON(!zalloc_cpumask_var(&top_cpuset.subparts_cpus, GFP_KERNEL));