Messages in this thread Patch in this message | | | From | Yury Norov <> | Subject | [PATCH 48/54] kernel/time: replace cpumask_weight with cpumask_weight_eq where appropriate | Date | Sun, 23 Jan 2022 10:39:19 -0800 |
| |
tick_cleanup_dead_cpu() calls cpumask_weight() to compare the weight of cpumask with a given number. We can do it more efficiently with cpumask_weight_eq() because conditional cpumask_weight may stop traversing the cpumask earlier, as soon as condition is met.
Signed-off-by: Yury Norov <yury.norov@gmail.com> --- kernel/time/clockevents.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c index 003ccf338d20..32d6629a55b2 100644 --- a/kernel/time/clockevents.c +++ b/kernel/time/clockevents.c @@ -648,7 +648,7 @@ void tick_cleanup_dead_cpu(int cpu) */ list_for_each_entry_safe(dev, tmp, &clockevent_devices, list) { if (cpumask_test_cpu(cpu, dev->cpumask) && - cpumask_weight(dev->cpumask) == 1 && + cpumask_weight_eq(dev->cpumask, 1) && !tick_is_broadcast_device(dev)) { BUG_ON(!clockevent_state_detached(dev)); list_del(&dev->list); -- 2.30.2
| |