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authorYinghai Lu <yhlu.kernel@gmail.com>2008-08-19 20:50:09 -0700
committerIngo Molnar <mingo@elte.hu>2008-10-16 16:52:32 +0200
commit7f95ec9e4c12fd067febfd57532da1166d75d858 (patch)
treeb395b6776485f60e3f5d9d820ad665161ef76771 /include
parent3060d6fe28570640c2d7d66d38b9eaa848c3b9e3 (diff)
x86: move kstat_irqs from kstat to irq_desc
based on Eric's patch ... together mold it with dyn_array for irq_desc, will allcate kstat_irqs for nr_irq_desc alltogether if needed. -- at that point nr_cpus is known already. v2: make sure system without generic_hardirqs works they don't have irq_desc v3: fix merging v4: [mingo@elte.hu] fix typo [ mingo@elte.hu ] irq: build fix fix: arch/x86/xen/spinlock.c: In function 'xen_spin_lock_slow': arch/x86/xen/spinlock.c:90: error: 'struct kernel_stat' has no member named 'irqs' Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/irq.h7
-rw-r--r--include/linux/kernel_stat.h22
2 files changed, 22 insertions, 7 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 60c856aaac0..cbf471aee1c 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -158,6 +158,11 @@ struct irq_desc {
struct irq_desc *next;
struct timer_rand_state *timer_rand_state;
#endif
+#ifdef CONFIG_HAVE_DYN_ARRAY
+ unsigned int *kstat_irqs;
+#else
+ unsigned int kstat_irqs[NR_CPUS];
+#endif
irq_flow_handler_t handle_irq;
struct irq_chip *chip;
struct msi_desc *msi_desc;
@@ -190,6 +195,8 @@ extern struct irq_desc *irq_to_desc(unsigned int irq);
/* could be removed if we get rid of all irq_desc reference */
extern struct irq_desc irq_desc[NR_IRQS];
#endif
+#define kstat_irqs_this_cpu(DESC) \
+ ((DESC)->kstat_irqs[smp_processor_id()])
/*
* Migration helpers for obsolete names, they will go away:
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index fe1f7fe534b..f10616712de 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -28,10 +28,8 @@ struct cpu_usage_stat {
struct kernel_stat {
struct cpu_usage_stat cpustat;
-#ifdef CONFIG_HAVE_DYN_ARRAY
- unsigned int *irqs;
-#else
- unsigned int irqs[NR_IRQS];
+#ifndef CONFIG_GENERIC_HARDIRQS
+ unsigned int irqs[NR_IRQS];
#endif
};
@@ -43,15 +41,25 @@ DECLARE_PER_CPU(struct kernel_stat, kstat);
extern unsigned long long nr_context_switches(void);
+#ifndef CONFIG_GENERIC_HARDIRQS
+static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
+{
+ return kstat_cpu(cpu).irqs[irq];
+}
+#else
+extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
+#endif
+
/*
* Number of interrupts per specific IRQ source, since bootup
*/
-static inline int kstat_irqs(int irq)
+static inline unsigned int kstat_irqs(unsigned int irq)
{
- int cpu, sum = 0;
+ unsigned int sum = 0;
+ int cpu;
for_each_possible_cpu(cpu)
- sum += kstat_cpu(cpu).irqs[irq];
+ sum += kstat_irqs_cpu(irq, cpu);
return sum;
}