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x86/apic: Use this_cpu_ptr() in local_timer_interrupt() 

Accessing the per cpu data via per_cpu(, smp_processor_id()) is
pointless. Use this_cpu_ptr() instead.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170828064956.829552757@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Thomas Gleixner 2017-08-28 08:47:24 +02:00 committed by Ingo Molnar
parent 302a98f896
commit 3bec6def39
1 changed files with 3 additions and 3 deletions
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6
arch/x86/kernel/apic/apic.c
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@ -988,8 +988,7 @@ void setup_secondary_APIC_clock(void)
*/
static void local_apic_timer_interrupt(void)
{
int cpu = smp_processor_id();
struct clock_event_device *evt = &per_cpu(lapic_events, cpu);
struct clock_event_device *evt = this_cpu_ptr(&lapic_events);
/*
* Normally we should not be here till LAPIC has been initialized but
@ -1003,7 +1002,8 @@ static void local_apic_timer_interrupt(void)
* spurious.
*/
if (!evt->event_handler) {
pr_warning("Spurious LAPIC timer interrupt on cpu %d\n", cpu);
pr_warning("Spurious LAPIC timer interrupt on cpu %d\n",
smp_processor_id());
/* Switch it off */
lapic_timer_shutdown(evt);
return;