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/posix-timers.h

@@ -0,0 +1,139 @@
+#ifndef _linux_POSIX_TIMERS_H
+#define _linux_POSIX_TIMERS_H
+
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/sched.h>
+
+union cpu_time_count {
+	cputime_t cpu;
+	unsigned long long sched;
+};
+
+struct cpu_timer_list {
+	struct list_head entry;
+	union cpu_time_count expires, incr;
+	struct task_struct *task;
+	int firing;
+};
+
+#define CPUCLOCK_PID(clock)		((pid_t) ~((clock) >> 3))
+#define CPUCLOCK_PERTHREAD(clock) \
+	(((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
+#define CPUCLOCK_PID_MASK	7
+#define CPUCLOCK_PERTHREAD_MASK	4
+#define CPUCLOCK_WHICH(clock)	((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
+#define CPUCLOCK_CLOCK_MASK	3
+#define CPUCLOCK_PROF		0
+#define CPUCLOCK_VIRT		1
+#define CPUCLOCK_SCHED		2
+#define CPUCLOCK_MAX		3
+
+#define MAKE_PROCESS_CPUCLOCK(pid, clock) \
+	((~(clockid_t) (pid) << 3) | (clockid_t) (clock))
+#define MAKE_THREAD_CPUCLOCK(tid, clock) \
+	MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK)
+
+/* POSIX.1b interval timer structure. */
+struct k_itimer {
+	struct list_head list;		/* free/ allocate list */
+	spinlock_t it_lock;
+	clockid_t it_clock;		/* which timer type */
+	timer_t it_id;			/* timer id */
+	int it_overrun;			/* overrun on pending signal  */
+	int it_overrun_last;		/* overrun on last delivered signal */
+	int it_requeue_pending;         /* waiting to requeue this timer */
+#define REQUEUE_PENDING 1
+	int it_sigev_notify;		/* notify word of sigevent struct */
+	int it_sigev_signo;		/* signo word of sigevent struct */
+	sigval_t it_sigev_value;	/* value word of sigevent struct */
+	struct task_struct *it_process;	/* process to send signal to */
+	struct sigqueue *sigq;		/* signal queue entry. */
+	union {
+		struct {
+			struct timer_list timer;
+			struct list_head abs_timer_entry; /* clock abs_timer_list */
+			struct timespec wall_to_prev;   /* wall_to_monotonic used when set */
+			unsigned long incr; /* interval in jiffies */
+		} real;
+		struct cpu_timer_list cpu;
+		struct {
+			unsigned int clock;
+			unsigned int node;
+			unsigned long incr;
+			unsigned long expires;
+		} mmtimer;
+	} it;
+};
+
+struct k_clock_abs {
+	struct list_head list;
+	spinlock_t lock;
+};
+struct k_clock {
+	int res;		/* in nano seconds */
+	int (*clock_getres) (clockid_t which_clock, struct timespec *tp);
+	struct k_clock_abs *abs_struct;
+	int (*clock_set) (clockid_t which_clock, struct timespec * tp);
+	int (*clock_get) (clockid_t which_clock, struct timespec * tp);
+	int (*timer_create) (struct k_itimer *timer);
+	int (*nsleep) (clockid_t which_clock, int flags, struct timespec *);
+	int (*timer_set) (struct k_itimer * timr, int flags,
+			  struct itimerspec * new_setting,
+			  struct itimerspec * old_setting);
+	int (*timer_del) (struct k_itimer * timr);
+#define TIMER_RETRY 1
+	void (*timer_get) (struct k_itimer * timr,
+			   struct itimerspec * cur_setting);
+};
+
+void register_posix_clock(clockid_t clock_id, struct k_clock *new_clock);
+
+/* Error handlers for timer_create, nanosleep and settime */
+int do_posix_clock_notimer_create(struct k_itimer *timer);
+int do_posix_clock_nonanosleep(clockid_t, int flags, struct timespec *);
+int do_posix_clock_nosettime(clockid_t, struct timespec *tp);
+
+/* function to call to trigger timer event */
+int posix_timer_event(struct k_itimer *timr, int si_private);
+
+struct now_struct {
+	unsigned long jiffies;
+};
+
+#define posix_get_now(now) (now)->jiffies = jiffies;
+#define posix_time_before(timer, now) \
+                      time_before((timer)->expires, (now)->jiffies)
+
+#define posix_bump_timer(timr, now)					\
+         do {								\
+              long delta, orun;						\
+	      delta = now.jiffies - (timr)->it.real.timer.expires;	\
+              if (delta >= 0) {						\
+	           orun = 1 + (delta / (timr)->it.real.incr);		\
+	          (timr)->it.real.timer.expires +=			\
+			 orun * (timr)->it.real.incr;			\
+                  (timr)->it_overrun += orun;				\
+              }								\
+            }while (0)
+
+int posix_cpu_clock_getres(clockid_t which_clock, struct timespec *);
+int posix_cpu_clock_get(clockid_t which_clock, struct timespec *);
+int posix_cpu_clock_set(clockid_t which_clock, const struct timespec *tp);
+int posix_cpu_timer_create(struct k_itimer *);
+int posix_cpu_nsleep(clockid_t, int, struct timespec *);
+int posix_cpu_timer_set(struct k_itimer *, int,
+			struct itimerspec *, struct itimerspec *);
+int posix_cpu_timer_del(struct k_itimer *);
+void posix_cpu_timer_get(struct k_itimer *, struct itimerspec *);
+
+void posix_cpu_timer_schedule(struct k_itimer *);
+
+void run_posix_cpu_timers(struct task_struct *);
+void posix_cpu_timers_exit(struct task_struct *);
+void posix_cpu_timers_exit_group(struct task_struct *);
+
+void set_process_cpu_timer(struct task_struct *, unsigned int,
+			   cputime_t *, cputime_t *);
+
+#endif