cpuset: remove dead code in cpuset-v1.c

The commit 6e1d31c ("cpuset: separate generate_sched_domains for v1
and v2") introduced dead code that was originally added for cpuset-v2
partition domain generation. Remove the redundant root_load_balance check.

Fixes: 6e1d31c ("cpuset: separate generate_sched_domains for v1 and v2")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/cgroups/9a442808-ed53-4657-988b-882cc0014c0d@huaweicloud.com/T/
Signed-off-by: Chen Ridong <chenridong@huawei.com>
Reviewed-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

Author: Chen Ridong

kernel/cgroup/cpuset-v1.c

@@ -605,7 +605,6 @@ int cpuset1_generate_sched_domains(cpumask_var_t **domains,
 	int ndoms = 0;		/* number of sched domains in result */
 	int nslot;		/* next empty doms[] struct cpumask slot */
 	struct cgroup_subsys_state *pos_css;
-	bool root_load_balance = is_sched_load_balance(&top_cpuset);
 	int nslot_update;
 
 	lockdep_assert_cpuset_lock_held();
@@ -615,7 +614,7 @@ int cpuset1_generate_sched_domains(cpumask_var_t **domains,
 	csa = NULL;
 
 	/* Special case for the 99% of systems with one, full, sched domain */
-	if (root_load_balance) {
+	if (is_sched_load_balance(&top_cpuset)) {
 		ndoms = 1;
 		doms = alloc_sched_domains(ndoms);
 		if (!doms)
@@ -638,8 +637,6 @@ int cpuset1_generate_sched_domains(cpumask_var_t **domains,
 	csn = 0;
 
 	rcu_read_lock();
-	if (root_load_balance)
-		csa[csn++] = &top_cpuset;
 	cpuset_for_each_descendant_pre(cp, pos_css, &top_cpuset) {
 		if (cp == &top_cpuset)
 			continue;