[patch 08/41] x86/apic: Use this_cpu_ptr in local_timer_interrupt
From: Thomas Gleixner
Date: Fri Aug 25 2017 - 07:04:00 EST
Accessing the per cpu data via per_cpu(, smp_processor_id()) is
pointless. Use this_cpu_ptr() instead.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/x86/kernel/apic/apic.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -990,8 +990,7 @@ 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
@@ -1005,7 +1004,8 @@ static void local_apic_timer_interrupt(v
* 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;