From 911488de0565f1d53bd36174d20917ebc4b44c0e Mon Sep 17 00:00:00 2001 From: Yury Norov <yury.norov@gmail.com> Date: Thu, 10 Feb 2022 14:49:05 -0800 Subject: genirq/affinity: Replace cpumask_weight() with cpumask_empty() where appropriate __irq_build_affinity_masks() calls cpumask_weight() to check if any bit of a given cpumask is set. This can be done more efficiently with cpumask_empty() because cpumask_empty() stops traversing the cpumask as soon as it finds first set bit, while cpumask_weight() counts all bits unconditionally. Signed-off-by: Yury Norov <yury.norov@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20220210224933.379149-22-yury.norov@gmail.com --- kernel/irq/affinity.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel') diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index f7ff8919dc9b..18740faf0eb1 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -258,7 +258,7 @@ static int __irq_build_affinity_masks(unsigned int startvec, nodemask_t nodemsk = NODE_MASK_NONE; struct node_vectors *node_vectors; - if (!cpumask_weight(cpu_mask)) + if (cpumask_empty(cpu_mask)) return 0; nodes = get_nodes_in_cpumask(node_to_cpumask, cpu_mask, &nodemsk); -- cgit v1.2.3