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sparc64: Use a seperate counter for timer interrupts and NMI checks, like x86. 

This keeps us from having to use kstat_irqs_cpu() from the NMI handler,
the former of which is a profiled function.

Instead we use a currently empty slot in the cpu_data

Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
David S. Miller 2010-04-06 17:38:52 -07:00
parent f8e8a8e8cb
commit daecbf58a5
3 changed files with 3 additions and 3 deletions
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2
arch/sparc/include/asm/cpudata_64.h
View File

@ -17,7 +17,7 @@ typedef struct {
unsigned int __nmi_count;
unsigned long clock_tick; /* %tick's per second */
unsigned long __pad;
unsigned int __pad1;
unsigned int irq0_irqs;
unsigned int __pad2;
/* Dcache line 2, rarely used */

3
arch/sparc/kernel/nmi.c
View File

@ -92,7 +92,6 @@ static void die_nmi(const char *str, struct pt_regs *regs, int do_panic)
notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs)
{
unsigned int sum, touched = 0;
int cpu = smp_processor_id();
clear_softint(1 << irq);
@ -106,7 +105,7 @@ notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs)
else
pcr_ops->write(PCR_PIC_PRIV);
sum = kstat_irqs_cpu(0, cpu);
sum = local_cpu_data().irq0_irqs;
if (__get_cpu_var(nmi_touch)) {
__get_cpu_var(nmi_touch) = 0;
touched = 1;

1
arch/sparc/kernel/time_64.c
View File

@ -728,6 +728,7 @@ void timer_interrupt(int irq, struct pt_regs *regs)
irq_enter();
local_cpu_data().irq0_irqs++;
kstat_incr_irqs_this_cpu(0, irq_to_desc(0));
if (unlikely(!evt->event_handler)) {