x86: Replace cpumask_weight() with cpumask_empty() where appropriate

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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 <yury.norov@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Steve Wahl <steve.wahl@hpe.com>
Link: https://lore.kernel.org/r/20220210224933.379149-17-yury.norov@gmail.com

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Yury Norov 2022-02-10 14:49:00 -08:00 • committed by Thomas Gleixner

parent 5a0893088a

commit 3a5ff1f6dd

3 changed files with 9 additions and 9 deletions

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14

arch/x86/kernel/cpu/resctrl/rdtgroup.c

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2

arch/x86/mm/mmio-mod.c

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2

arch/x86/platform/uv/uv_nmi.c

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