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#ifndef _LINUX_KERNEL_STAT_H
#define _LINUX_KERNEL_STAT_H
#include <linux/config.h>
#include <asm/irq.h>
#include <linux/smp.h>
#include <linux/threads.h>
#include <linux/percpu.h>
/*
* 'kernel_stat.h' contains the definitions needed for doing
* some kernel statistics (CPU usage, context switches ...),
* used by rstatd/perfmeter
*/
struct cpu_usage_stat {
unsigned int user;
unsigned int nice;
unsigned int system;
unsigned int idle;
unsigned int iowait;
};
struct kernel_stat {
struct cpu_usage_stat cpustat;
#if !defined(CONFIG_ARCH_S390)
unsigned int irqs[NR_IRQS];
#endif
};
DECLARE_PER_CPU(struct kernel_stat, kstat);
#define kstat_cpu(cpu) per_cpu(kstat, cpu)
#define kstat_this_cpu kstat_cpu(smp_processor_id())
extern unsigned long nr_context_switches(void);
/*
* Maybe we need to smp-ify kernel_stat some day. It would be nice to do
* that without having to modify all the code that increments the stats.
*/
#define KERNEL_STAT_INC(x) kstat.x++
#define KERNEL_STAT_ADD(x, y) kstat.x += y
#if !defined(CONFIG_ARCH_S390)
/*
* Number of interrupts per specific IRQ source, since bootup
*/
static inline int kstat_irqs (int irq)
{
int i, sum=0;
for (i = 0 ; i < NR_CPUS ; i++)
if (cpu_possible(i))
sum += kstat_cpu(i).irqs[irq];
return sum;
}
#endif
#endif /* _LINUX_KERNEL_STAT_H */
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