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powerpc: Make irq_stat.timers_irqs counting more specific

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Current irq_stat.timers_irqs counting doesn't discriminate timer event handler
and other timer interrupt(like arch_irq_work_raise). Sometimes we need to know
exactly how much interrupts timer event handler fired, so let's be more specific
on this.

Signed-off-by: Fan Du <fan.du@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
fan.du
2013-01-23 16:06:11 +08:00
committed by Benjamin Herrenschmidt
parent 0ce636700c
commit c041cfa2af
3 changed files with 13 additions and 5 deletions
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3
arch/powerpc/kernel/time.c
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@@ -510,7 +510,6 @@ void timer_interrupt(struct pt_regs * regs)
*/
may_hard_irq_enable();
__get_cpu_var(irq_stat).timer_irqs++;
#if defined(CONFIG_PPC32) && defined(CONFIG_PMAC)
if (atomic_read(&ppc_n_lost_interrupts) != 0)
@@ -532,10 +531,12 @@ void timer_interrupt(struct pt_regs * regs)
*next_tb = ~(u64)0;
if (evt->event_handler)
evt->event_handler(evt);
__get_cpu_var(irq_stat).timer_irqs_event++;
} else {
now = *next_tb - now;
if (now <= DECREMENTER_MAX)
set_dec((int)now);
__get_cpu_var(irq_stat).timer_irqs_others++;
}
#ifdef CONFIG_PPC64