cgroup/cpuset: drop useless cpumask_empty() in compute_effective_exclusive_cpumask()

JIRA: https://issues.redhat.com/browse/RHEL-107751

commit 225c036
Author: Yury Norov <yury.norov@gmail.com>
Date:   Thu, 8 May 2025 15:32:06 -0400

    cgroup/cpuset: drop useless cpumask_empty() in compute_effective_exclusive_cpumask()

    Empty cpumasks can't intersect with any others. Therefore, testing for
    non-emptyness is useless.

    Signed-off-by: Yury Norov <yury.norov@gmail.com>
    Reviewed-by: Waiman Long <longman@redhat.com>
    Signed-off-by: Tejun Heo <tj@kernel.org>

Signed-off-by: Waiman Long <longman@redhat.com>

Author: Waiman-Long

kernel/cgroup/cpuset.c

@@ -1404,14 +1404,12 @@ static int compute_effective_exclusive_cpumask(struct cpuset *cs,
 		if (sibling == cs)
 			continue;
 
-		if (!cpumask_empty(sibling->exclusive_cpus) &&
-		    cpumask_intersects(xcpus, sibling->exclusive_cpus)) {
+		if (cpumask_intersects(xcpus, sibling->exclusive_cpus)) {
 			cpumask_andnot(xcpus, xcpus, sibling->exclusive_cpus);
 			retval++;
 			continue;
 		}
-		if (!cpumask_empty(sibling->effective_xcpus) &&
-		    cpumask_intersects(xcpus, sibling->effective_xcpus)) {
+		if (cpumask_intersects(xcpus, sibling->effective_xcpus)) {
 			cpumask_andnot(xcpus, xcpus, sibling->effective_xcpus);
 			retval++;
 		}