The following commit has been merged into the irq/core branch of tip: Commit-ID: 911488de0565f1d53bd36174d20917ebc4b44c0e Gitweb: https://git.kernel.org/tip/911488de0565f1d53bd36174d20917ebc4b44c0e Author: Yury Norov <yury.norov@xxxxxxxxx> AuthorDate: Thu, 10 Feb 2022 14:49:05 -08:00 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitterDate: Sun, 10 Apr 2022 22:20:28 +02:00 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@xxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20220210224933.379149-22-yury.norov@xxxxxxxxx --- kernel/irq/affinity.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index f7ff891..18740fa 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);
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