sched: Fix do_set_cpus_allowed() locking

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All callers of do_set_cpus_allowed() only take p->pi_lock, which is
not sufficient to actually change the cpumask. Again, this is mostly
ok in these cases, but it results in unnecessarily complicated
reasoning.

Furthermore, there is no reason what so ever to not just take all the
required locks, so do just that.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Juri Lelli <juri.lelli@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Vincent Guittot <vincent.guittot@linaro.org>

...

This commit is contained in:

Peter Zijlstra 2025-09-10 09:51:06 +02:00

parent 942b8db965

commit abfc01077d

3 changed files with 17 additions and 24 deletions

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15

kernel/kthread.c

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21

kernel/sched/core.c

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5

kernel/sched/sched.h

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