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| author | Yury Norov <yury.norov@gmail.com> | 2022-01-23 19:38:46 +0100 |
|---|---|---|
| committer | Yury Norov <yury.norov@gmail.com> | 2022-06-03 15:52:57 +0200 |
| commit | 4aec74bccf5d047347bdfef3638e3031dd75c0a0 (patch) | |
| tree | 1c47143b5015168e9c99f2cc5673b9ebd19822fc /arch/x86/mm/mmio-mod.c | |
| parent | arch/ia64: replace cpumask_weight with cpumask_empty where appropriate (diff) | |
| download | linux-4aec74bccf5d047347bdfef3638e3031dd75c0a0.tar.xz linux-4aec74bccf5d047347bdfef3638e3031dd75c0a0.zip | |
arch/x86: replace cpumask_weight with cpumask_empty where appropriate
In some cases, arch/x86 code calls cpumask_weight() to check if any bit of
a given cpumask is set. We can do it 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>
Reviewed-by: Steve Wahl <steve.wahl@hpe.com>
Diffstat (limited to 'arch/x86/mm/mmio-mod.c')
| -rw-r--r-- | arch/x86/mm/mmio-mod.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/mmio-mod.c b/arch/x86/mm/mmio-mod.c index 933a2ebad471..c3317f0650d8 100644 --- a/arch/x86/mm/mmio-mod.c +++ b/arch/x86/mm/mmio-mod.c @@ -400,7 +400,7 @@ static void leave_uniprocessor(void) int cpu; int err; - if (!cpumask_available(downed_cpus) || cpumask_weight(downed_cpus) == 0) + if (!cpumask_available(downed_cpus) || cpumask_empty(downed_cpus)) return; pr_notice("Re-enabling CPUs...\n"); for_each_cpu(cpu, downed_cpus) { |