[patch V3 09/44] x86/apic: Use this_cpu_ptr in local_timer_interrupt

Thomas Gleixner
2017-08-28T07:03:25Z

[-- Attachment #1: x86-apic--Use-this_cpu_ptr-in-local_timer_interrupt.patch --]
[-- Type: text/plain, Size: 1003 bytes --]

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>
---
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
@@ -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(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;