--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/linux/kernel_stat.h	Sun Jan 11 20:20:11 2009 +0100
@@ -0,0 +1,76 @@
+#ifndef _LINUX_KERNEL_STAT_H
+#define _LINUX_KERNEL_STAT_H
+
+#include <linux/smp.h>
+#include <linux/threads.h>
+#include <linux/percpu.h>
+#include <linux/cpumask.h>
+#include <asm/irq.h>
+#include <asm/cputime.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 {
+	cputime64_t user;
+	cputime64_t nice;
+	cputime64_t system;
+	cputime64_t softirq;
+	cputime64_t irq;
+	cputime64_t idle;
+	cputime64_t iowait;
+	cputime64_t steal;
+	cputime64_t guest;
+};
+
+struct kernel_stat {
+	struct cpu_usage_stat	cpustat;
+	unsigned int irqs[NR_IRQS];
+};
+
+DECLARE_PER_CPU(struct kernel_stat, kstat);
+
+#define kstat_cpu(cpu)	per_cpu(kstat, cpu)
+/* Must have preemption disabled for this to be meaningful. */
+#define kstat_this_cpu	__get_cpu_var(kstat)
+
+extern unsigned long long nr_context_switches(void);
+
+struct irq_desc;
+
+static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
+					    struct irq_desc *desc)
+{
+	kstat_this_cpu.irqs[irq]++;
+}
+
+static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
+{
+       return kstat_cpu(cpu).irqs[irq];
+}
+
+/*
+ * Number of interrupts per specific IRQ source, since bootup
+ */
+static inline unsigned int kstat_irqs(unsigned int irq)
+{
+	unsigned int sum = 0;
+	int cpu;
+
+	for_each_possible_cpu(cpu)
+		sum += kstat_irqs_cpu(irq, cpu);
+
+	return sum;
+}
+
+extern unsigned long long task_delta_exec(struct task_struct *);
+extern void account_user_time(struct task_struct *, cputime_t);
+extern void account_user_time_scaled(struct task_struct *, cputime_t);
+extern void account_system_time(struct task_struct *, int, cputime_t);
+extern void account_system_time_scaled(struct task_struct *, cputime_t);
+extern void account_steal_time(struct task_struct *, cputime_t);
+
+#endif /* _LINUX_KERNEL_STAT_H */