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A simple cleanup for the CPU hotplug code to avoid per_cpu_ptr() 

reevaluation.
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Merge tag 'smp-core-2021-06-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull CPU hotplug cleanup from Thomas Gleixner:
 "A simple cleanup for the CPU hotplug code to avoid per_cpu_ptr()
  reevaluation"

* tag 'smp-core-2021-06-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  cpu/hotplug: Simplify access to percpu cpuhp_state
This commit is contained in:
Linus Torvalds 2021-06-29 12:21:21 -07:00
parent e563592c3e 130708331b
commit 371fb85457
1 changed files with 2 additions and 2 deletions
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4
kernel/cpu.c
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@ -961,7 +961,7 @@ static int takedown_cpu(unsigned int cpu)
int err;
/* Park the smpboot threads */
kthread_park(per_cpu_ptr(&cpuhp_state, cpu)->thread);
kthread_park(st->thread);
/*
* Prevent irq alloc/free while the dying cpu reorganizes the
@ -977,7 +977,7 @@ static int takedown_cpu(unsigned int cpu)
/* CPU refused to die */
irq_unlock_sparse();
/* Unpark the hotplug thread so we can rollback there */
kthread_unpark(per_cpu_ptr(&cpuhp_state, cpu)->thread);
kthread_unpark(st->thread);
return err;
}
BUG_ON(cpu_online(cpu));