cpumask: Cache num_possible_cpus()

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Reevaluating num_possible_cpus() over and over does not make sense. That
becomes a constant after init as cpu_possible_mask is marked ro_after_init.

Cache the value during initialization and provide that for consumption.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Link: https://patch.msgid.link/20251119172549.578653738@linutronix.de

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This commit is contained in:

Thomas Gleixner 2025-11-19 18:27:01 +01:00

parent 79c11fb3da

commit 35a5c37cb9

2 changed files with 27 additions and 2 deletions

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10

include/linux/cpumask.h

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19

kernel/cpu.c

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