cpuset: Fix missing adaptation for cpuset_is_populated

Commit b1bcaed ("cpuset: Treat cpusets in attaching as populated")
was backported to the long‑term support (LTS) branches. However, because
commit d5cf4d3 ("cgroup/cpuset: Don't track # of local child
partitions") was not backported, a corresponding adaptation to the
backported code is still required.

To ensure correct behavior, replace cgroup_is_populated with
cpuset_is_populated in the partition_is_populated function.

Cc: stable@vger.kernel.org	# 6.1+
Fixes: b1bcaed ("cpuset: Treat cpusets in attaching as populated")
Cc: Waiman Long <longman@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Chen Ridong <chenridong@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Chen Ridong

kernel/cgroup/cpuset.c

@@ -385,7 +385,7 @@ static inline bool partition_is_populated(struct cpuset *cs,
 	    cs->attach_in_progress)
 		return true;
 	if (!excluded_child && !cs->nr_subparts)
-		return cgroup_is_populated(cs->css.cgroup);
+		return cpuset_is_populated(cs);
 
 	rcu_read_lock();
 	cpuset_for_each_descendant_pre(cp, pos_css, cs) {