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xen/cpuhotplug: Replace cpu_up/down() with device_online/offline()

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The core device API performs extra housekeeping bits that are missing
from directly calling cpu_up/down().

See commit a6717c01dd ("powerpc/rtas: use device model APIs and
serialization during LPM") for an example description of what might go
wrong.

This also prepares to make cpu_up/down() a private interface of the cpu
subsystem.

Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lkml.kernel.org/r/20200323135110.30522-14-qais.yousef@arm.com
This commit is contained in:
Qais Yousef 2020-03-23 13:51:06 +00:00 • committed by Thomas Gleixner
parent 02addaeaa7
commit a926f81d2f
1 changed files with 1 additions and 1 deletions
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2
drivers/xen/cpu_hotplug.c
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@ -94,7 +94,7 @@ static int setup_cpu_watcher(struct notifier_block *notifier,
for_each_possible_cpu(cpu) { for_each_possible_cpu(cpu) {
if (vcpu_online(cpu) == 0) { if (vcpu_online(cpu) == 0) {
(void)cpu_down(cpu); device_offline(get_cpu_device(cpu));
set_cpu_present(cpu, false); set_cpu_present(cpu, false);
} }
} }