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| author |   Scott Wood <swood@redhat.com> | 2018-05-24 10:44:20 -0500 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2018-05-27 21:50:09 +0200 |
| commit | ff987fcf011d20c53b3a613edf6e2055ea48e26e (patch) | |
| tree | 08371cc583f07acdd3c0089ecfe16391b9bfd168 /arch/x86/kernel | |
| parent | Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm (diff) | |
| download | linux-dev-ff987fcf011d20c53b3a613edf6e2055ea48e26e.tar.xz linux-dev-ff987fcf011d20c53b3a613edf6e2055ea48e26e.zip | |
x86/microcode: Make the late update update_lock a raw lock for RT
__reload_late() is called from stop_machine context and thus cannot
acquire a non-raw spinlock on PREEMPT_RT.
Signed-off-by: Scott Wood <swood@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Pei Zhang <pezhang@redhat.com>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/20180524154420.24455-1-swood@redhat.com
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/core.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c index 77e201301528..08286269fd24 100644 --- a/arch/x86/kernel/cpu/microcode/core.c +++ b/arch/x86/kernel/cpu/microcode/core.c @@ -70,7 +70,7 @@ static DEFINE_MUTEX(microcode_mutex); /* * Serialize late loading so that CPUs get updated one-by-one. */ -static DEFINE_SPINLOCK(update_lock); +static DEFINE_RAW_SPINLOCK(update_lock); struct ucode_cpu_info ucode_cpu_info[NR_CPUS]; @@ -560,9 +560,9 @@ static int __reload_late(void *info) if (__wait_for_cpus(&late_cpus_in, NSEC_PER_SEC)) return -1; - spin_lock(&update_lock); + raw_spin_lock(&update_lock); apply_microcode_local(&err); - spin_unlock(&update_lock); + raw_spin_unlock(&update_lock); /* siblings return UCODE_OK because their engine got updated already */ if (err > UCODE_NFOUND) { |