cpufreq/sched: Move cpufreq-specific EAS checks to cpufreq

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Doing cpufreq-specific EAS checks that require accessing policy
internals directly from sched_is_eas_possible() is a bit unfortunate,
so introduce cpufreq_ready_for_eas() in cpufreq, move those checks
into that new function and make sched_is_eas_possible() call it.

While at it, address a possible race between the EAS governor check
and governor change by doing the former under the policy rwsem.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
Tested-by: Christian Loehle <christian.loehle@arm.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://patch.msgid.link/2317800.iZASKD2KPV@rjwysocki.net

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This commit is contained in:

Rafael J. Wysocki 2025-05-06 22:37:15 +02:00

parent f42c8556a0

commit 4854649b1f

3 changed files with 39 additions and 20 deletions

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32

drivers/cpufreq/cpufreq.c

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2

include/linux/cpufreq.h

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25

kernel/sched/topology.c

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