[PATCH 2/5] cpu/hotplug: Use cpumask_intersects where applicable

[Shrikanth Hegde <sshegde@linux.ibm.com>]

cpumask_any_and returns, usually the first cpu in the intersection
of the two cpumasks. However, if the returned value is not used or
only to check it against nr_cpu_ids, that implies whether the two
cpumask have a bit in common. i.e cpumask_intersects.

cpumask_any_and uses ffs on (addr1[idx] & addr2[idx]) whereas
cpumask_intersects checks only (addr1[idx] & addr2[idx]).

So replace such occurrences.

Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
---
 kernel/cpu.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 376d297a6292..e39245d9bffe 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1418,8 +1418,7 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen,
 	 * Keep at least one housekeeping cpu onlined to avoid generating
 	 * an empty sched_domain span.
 	 */
-	if (cpumask_any_and(cpu_online_mask,
-			    housekeeping_cpumask(HK_TYPE_DOMAIN)) >= nr_cpu_ids) {
+	if (!cpumask_intersects(cpu_online_mask, housekeeping_cpumask(HK_TYPE_DOMAIN))) {
 		ret = -EBUSY;
 		goto out;
 	}
-- 
2.52.0