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ARM: SMP: collect IPI and local timer IRQs for /proc/stat 

The IPI and local timer interrupts weren't being properly accounted
for in /proc/stat.  Collect them from the irq_stat structure, and
return their sum.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-11-15 14:46:46 +00:00
parent 4a88abd7b4
commit b54992fe1b
2 changed files with 23 additions and 0 deletions
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8
arch/arm/include/asm/hardirq.h
View File

@ -22,6 +22,14 @@ typedef struct {
#define __inc_irq_stat(cpu, member) __IRQ_STAT(cpu, member)++
#define __get_irq_stat(cpu, member) __IRQ_STAT(cpu, member)
#ifdef CONFIG_SMP
u64 smp_irq_stat_cpu(unsigned int cpu);
#else
#define smp_irq_stat_cpu(cpu) 0
#endif
#define arch_irq_stat_cpu smp_irq_stat_cpu
#if NR_IRQS > 512
#define HARDIRQ_BITS 10
#elif NR_IRQS > 256

15
arch/arm/kernel/smp.c
View File

@ -406,6 +406,21 @@ void show_ipi_list(struct seq_file *p, int prec)
}
}
u64 smp_irq_stat_cpu(unsigned int cpu)
{
u64 sum = 0;
int i;
for (i = 0; i < NR_IPI; i++)
sum += __get_irq_stat(cpu, ipi_irqs[i]);
#ifdef CONFIG_LOCAL_TIMERS
sum += __get_irq_stat(cpu, local_timer_irqs);
#endif
return sum;
}
/*
* Timer (local or broadcast) support
*/