From 3a5ff1f6dd50f5e1c2aa87491910dd6d275af24b Mon Sep 17 00:00:00 2001 From: Yury Norov Date: Thu, 10 Feb 2022 14:49:00 -0800 Subject: x86: Replace cpumask_weight() with cpumask_empty() where appropriate In some cases, x86 code 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 Signed-off-by: Thomas Gleixner Reviewed-by: Steve Wahl Link: https://lore.kernel.org/r/20220210224933.379149-17-yury.norov@gmail.com --- arch/x86/platform/uv/uv_nmi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/x86/platform') diff --git a/arch/x86/platform/uv/uv_nmi.c b/arch/x86/platform/uv/uv_nmi.c index 1e9ff28bc2e0..ea277fc08357 100644 --- a/arch/x86/platform/uv/uv_nmi.c +++ b/arch/x86/platform/uv/uv_nmi.c @@ -985,7 +985,7 @@ static int uv_handle_nmi(unsigned int reason, struct pt_regs *regs) /* Clear global flags */ if (master) { - if (cpumask_weight(uv_nmi_cpu_mask)) + if (!cpumask_empty(uv_nmi_cpu_mask)) uv_nmi_cleanup_mask(); atomic_set(&uv_nmi_cpus_in_nmi, -1); atomic_set(&uv_nmi_cpu, -1); -- cgit v1.2.3