diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2020-03-21 01:24:36 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-03-25 12:09:39 +1100 |
| commit | adde8715cf0571878d37fcb20595aad57b923bab (patch) | |
| tree | 9f34cbaa5c994062a091bdeb5acef4f68b1dd7a2 /arch/powerpc/platforms | |
| parent | e86350f70a02e5b4e26b0eccedb575a7490bc834 (diff) | |
powerpc/pseries: Avoid harmless preempt warning
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
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/pseries/lpar.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 3c3da25b445c..e4ed5317f117 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -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)) |