Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

include/linux/kernel_stat.h

@@ -0,0 +1,59 @@
+#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>
+#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;
+};
+
+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);
+
+/*
+ * 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;
+}
+
+extern void account_user_time(struct task_struct *, cputime_t);
+extern void account_system_time(struct task_struct *, int, cputime_t);
+extern void account_steal_time(struct task_struct *, cputime_t);
+
+#endif /* _LINUX_KERNEL_STAT_H */