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

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>

arch/x86/include/asm/apic.h

@@ -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);

arch/x86/include/asm/hardirq.h

@@ -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;

arch/x86/kernel/apic/apic.c

@@ -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);
 

arch/x86/kernel/irq.c

@@ -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;