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powerpc/pseries: Avoid harmless preempt warning

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Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200320152436.1468651-1-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2020-03-21 01:24:36 +10:00 committed by Michael Ellerman
parent e86350f70a
commit adde8715cf
1 changed files with 9 additions and 1 deletions
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10
arch/powerpc/platforms/pseries/lpar.c
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@ -636,8 +636,16 @@ static const struct proc_ops vcpudispatch_stats_freq_proc_ops = {
static int __init vcpudispatch_stats_procfs_init(void)
{
if (!lppaca_shared_proc(get_lppaca()))
/*
* Avoid smp_processor_id while preemptible. All CPUs should have
* the same value for lppaca_shared_proc.
*/
preempt_disable();
if (!lppaca_shared_proc(get_lppaca())) {
preempt_enable();
return 0;
}
preempt_enable();
if (!proc_create("powerpc/vcpudispatch_stats", 0600, NULL,
&vcpudispatch_stats_proc_ops))