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x86: Convert per-cpu counter icr_read_retry_count into a member of irq_stat

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LAPIC related statistics are grouped inside the per-cpu
structure irq_stat, so there is no need for icr_read_retry_count
to be a standalone per-cpu variable.

This patch moves icr_read_retry_count to where it belongs.

Suggested-y: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Cc: Jörn Engel <joern@logfs.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Fernando Luis Vazquez Cao 2011-12-15 11:32:24 +09:00 committed by Ingo Molnar
parent 346b46be5f
commit b49d7d877f
4 changed files with 4 additions and 10 deletions
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2
arch/x86/include/asm/apic.h
View File

@ -411,8 +411,6 @@ extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
#ifdef CONFIG_X86_LOCAL_APIC
DECLARE_PER_CPU(unsigned, icr_read_retry_count);
static inline u32 apic_read(u32 reg)
{
return apic->read(reg);

1
arch/x86/include/asm/hardirq.h
View File

@ -11,6 +11,7 @@ typedef struct {
#ifdef CONFIG_X86_LOCAL_APIC
unsigned int apic_timer_irqs; /* arch dependent */
unsigned int irq_spurious_count;
unsigned int icr_read_retry_count;
#endif
unsigned int x86_platform_ipis; /* arch dependent */
unsigned int apic_perf_irqs;

7
arch/x86/kernel/apic/apic.c
View File

@ -79,11 +79,6 @@ DEFINE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid, BAD_APICID);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
/*
* ICR read retry counter
*/
DEFINE_PER_CPU(unsigned, icr_read_retry_count);
#ifdef CONFIG_X86_32
/*
@ -255,7 +250,7 @@ u32 native_safe_apic_wait_icr_idle(void)
send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
if (!send_status)
break;
percpu_inc(icr_read_retry_count);
inc_irq_stat(icr_read_retry_count);
udelay(100);
} while (timeout++ < 1000);

4
arch/x86/kernel/irq.c
View File

@ -76,7 +76,7 @@ int arch_show_interrupts(struct seq_file *p, int prec)
seq_printf(p, " IRQ work interrupts\n");
seq_printf(p, "%*s: ", prec, "RTR");
for_each_online_cpu(j)
seq_printf(p, "%10u ", per_cpu(icr_read_retry_count, j));
seq_printf(p, "%10u ", irq_stats(j)->icr_read_retry_count);
seq_printf(p, " APIC ICR read retries\n");
#endif
if (x86_platform_ipi_callback) {
@ -140,7 +140,7 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
sum += irq_stats(cpu)->irq_spurious_count;
sum += irq_stats(cpu)->apic_perf_irqs;
sum += irq_stats(cpu)->apic_irq_work_irqs;
sum += per_cpu(icr_read_retry_count, cpu);
sum += irq_stats(cpu)->icr_read_retry_count;
#endif
if (x86_platform_ipi_callback)
sum += irq_stats(cpu)->x86_platform_ipis;