time/timers: Move all time(r) related files into kernel/time

Except for Kconfig.HZ. That needs a separate treatment.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 0 insertions, 301 deletions

diff --git a/kernel/itimer.c b/kernel/itimer.c
deleted file mode 100644
index 8d262b4..0000000
--- a/kernel/itimer.c
+++ /dev/null
@@ -1,301 +0,0 @@
-/*
- * linux/kernel/itimer.c
- *
- * Copyright (C) 1992 Darren Senn
- */
-
-/* These are all the functions necessary to implement itimers */
-
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/syscalls.h>
-#include <linux/time.h>
-#include <linux/posix-timers.h>
-#include <linux/hrtimer.h>
-#include <trace/events/timer.h>
-
-#include <asm/uaccess.h>
-
-/**
- * itimer_get_remtime - get remaining time for the timer
- *
- * @timer: the timer to read
- *
- * Returns the delta between the expiry time and now, which can be
- * less than zero or 1usec for an pending expired timer
- */
-static struct timeval itimer_get_remtime(struct hrtimer *timer)
-{
-	ktime_t rem = hrtimer_get_remaining(timer);
-
-	/*
-	 * Racy but safe: if the itimer expires after the above
-	 * hrtimer_get_remtime() call but before this condition
-	 * then we return 0 - which is correct.
-	 */
-	if (hrtimer_active(timer)) {
-		if (rem.tv64 <= 0)
-			rem.tv64 = NSEC_PER_USEC;
-	} else
-		rem.tv64 = 0;
-
-	return ktime_to_timeval(rem);
-}
-
-static void get_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
-			   struct itimerval *const value)
-{
-	cputime_t cval, cinterval;
-	struct cpu_itimer *it = &tsk->signal->it[clock_id];
-
-	spin_lock_irq(&tsk->sighand->siglock);
-
-	cval = it->expires;
-	cinterval = it->incr;
-	if (cval) {
-		struct task_cputime cputime;
-		cputime_t t;
-
-		thread_group_cputimer(tsk, &cputime);
-		if (clock_id == CPUCLOCK_PROF)
-			t = cputime.utime + cputime.stime;
-		else
-			/* CPUCLOCK_VIRT */
-			t = cputime.utime;
-
-		if (cval < t)
-			/* about to fire */
-			cval = cputime_one_jiffy;
-		else
-			cval = cval - t;
-	}
-
-	spin_unlock_irq(&tsk->sighand->siglock);
-
-	cputime_to_timeval(cval, &value->it_value);
-	cputime_to_timeval(cinterval, &value->it_interval);
-}
-
-int do_getitimer(int which, struct itimerval *value)
-{
-	struct task_struct *tsk = current;
-
-	switch (which) {
-	case ITIMER_REAL:
-		spin_lock_irq(&tsk->sighand->siglock);
-		value->it_value = itimer_get_remtime(&tsk->signal->real_timer);
-		value->it_interval =
-			ktime_to_timeval(tsk->signal->it_real_incr);
-		spin_unlock_irq(&tsk->sighand->siglock);
-		break;
-	case ITIMER_VIRTUAL:
-		get_cpu_itimer(tsk, CPUCLOCK_VIRT, value);
-		break;
-	case ITIMER_PROF:
-		get_cpu_itimer(tsk, CPUCLOCK_PROF, value);
-		break;
-	default:
-		return(-EINVAL);
-	}
-	return 0;
-}
-
-SYSCALL_DEFINE2(getitimer, int, which, struct itimerval __user *, value)
-{
-	int error = -EFAULT;
-	struct itimerval get_buffer;
-
-	if (value) {
-		error = do_getitimer(which, &get_buffer);
-		if (!error &&
-		    copy_to_user(value, &get_buffer, sizeof(get_buffer)))
-			error = -EFAULT;
-	}
-	return error;
-}
-
-
-/*
- * The timer is automagically restarted, when interval != 0
- */
-enum hrtimer_restart it_real_fn(struct hrtimer *timer)
-{
-	struct signal_struct *sig =
-		container_of(timer, struct signal_struct, real_timer);
-
-	trace_itimer_expire(ITIMER_REAL, sig->leader_pid, 0);
-	kill_pid_info(SIGALRM, SEND_SIG_PRIV, sig->leader_pid);
-
-	return HRTIMER_NORESTART;
-}
-
-static inline u32 cputime_sub_ns(cputime_t ct, s64 real_ns)
-{
-	struct timespec ts;
-	s64 cpu_ns;
-
-	cputime_to_timespec(ct, &ts);
-	cpu_ns = timespec_to_ns(&ts);
-
-	return (cpu_ns <= real_ns) ? 0 : cpu_ns - real_ns;
-}
-
-static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
-			   const struct itimerval *const value,
-			   struct itimerval *const ovalue)
-{
-	cputime_t cval, nval, cinterval, ninterval;
-	s64 ns_ninterval, ns_nval;
-	u32 error, incr_error;
-	struct cpu_itimer *it = &tsk->signal->it[clock_id];
-
-	nval = timeval_to_cputime(&value->it_value);
-	ns_nval = timeval_to_ns(&value->it_value);
-	ninterval = timeval_to_cputime(&value->it_interval);
-	ns_ninterval = timeval_to_ns(&value->it_interval);
-
-	error = cputime_sub_ns(nval, ns_nval);
-	incr_error = cputime_sub_ns(ninterval, ns_ninterval);
-
-	spin_lock_irq(&tsk->sighand->siglock);
-
-	cval = it->expires;
-	cinterval = it->incr;
-	if (cval || nval) {
-		if (nval > 0)
-			nval += cputime_one_jiffy;
-		set_process_cpu_timer(tsk, clock_id, &nval, &cval);
-	}
-	it->expires = nval;
-	it->incr = ninterval;
-	it->error = error;
-	it->incr_error = incr_error;
-	trace_itimer_state(clock_id == CPUCLOCK_VIRT ?
-			   ITIMER_VIRTUAL : ITIMER_PROF, value, nval);
-
-	spin_unlock_irq(&tsk->sighand->siglock);
-
-	if (ovalue) {
-		cputime_to_timeval(cval, &ovalue->it_value);
-		cputime_to_timeval(cinterval, &ovalue->it_interval);
-	}
-}
-
-/*
- * Returns true if the timeval is in canonical form
- */
-#define timeval_valid(t) \
-	(((t)->tv_sec >= 0) && (((unsigned long) (t)->tv_usec) < USEC_PER_SEC))
-
-int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue)
-{
-	struct task_struct *tsk = current;
-	struct hrtimer *timer;
-	ktime_t expires;
-
-	/*
-	 * Validate the timevals in value.
-	 */
-	if (!timeval_valid(&value->it_value) ||
-	    !timeval_valid(&value->it_interval))
-		return -EINVAL;
-
-	switch (which) {
-	case ITIMER_REAL:
-again:
-		spin_lock_irq(&tsk->sighand->siglock);
-		timer = &tsk->signal->real_timer;
-		if (ovalue) {
-			ovalue->it_value = itimer_get_remtime(timer);
-			ovalue->it_interval
-				= ktime_to_timeval(tsk->signal->it_real_incr);
-		}
-		/* We are sharing ->siglock with it_real_fn() */
-		if (hrtimer_try_to_cancel(timer) < 0) {
-			spin_unlock_irq(&tsk->sighand->siglock);
-			goto again;
-		}
-		expires = timeval_to_ktime(value->it_value);
-		if (expires.tv64 != 0) {
-			tsk->signal->it_real_incr =
-				timeval_to_ktime(value->it_interval);
-			hrtimer_start(timer, expires, HRTIMER_MODE_REL);
-		} else
-			tsk->signal->it_real_incr.tv64 = 0;
-
-		trace_itimer_state(ITIMER_REAL, value, 0);
-		spin_unlock_irq(&tsk->sighand->siglock);
-		break;
-	case ITIMER_VIRTUAL:
-		set_cpu_itimer(tsk, CPUCLOCK_VIRT, value, ovalue);
-		break;
-	case ITIMER_PROF:
-		set_cpu_itimer(tsk, CPUCLOCK_PROF, value, ovalue);
-		break;
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-/**
- * alarm_setitimer - set alarm in seconds
- *
- * @seconds:	number of seconds until alarm
- *		0 disables the alarm
- *
- * Returns the remaining time in seconds of a pending timer or 0 when
- * the timer is not active.
- *
- * On 32 bit machines the seconds value is limited to (INT_MAX/2) to avoid
- * negative timeval settings which would cause immediate expiry.
- */
-unsigned int alarm_setitimer(unsigned int seconds)
-{
-	struct itimerval it_new, it_old;
-
-#if BITS_PER_LONG < 64
-	if (seconds > INT_MAX)
-		seconds = INT_MAX;
-#endif
-	it_new.it_value.tv_sec = seconds;
-	it_new.it_value.tv_usec = 0;
-	it_new.it_interval.tv_sec = it_new.it_interval.tv_usec = 0;
-
-	do_setitimer(ITIMER_REAL, &it_new, &it_old);
-
-	/*
-	 * We can't return 0 if we have an alarm pending ...  And we'd
-	 * better return too much than too little anyway
-	 */
-	if ((!it_old.it_value.tv_sec && it_old.it_value.tv_usec) ||
-	      it_old.it_value.tv_usec >= 500000)
-		it_old.it_value.tv_sec++;
-
-	return it_old.it_value.tv_sec;
-}
-
-SYSCALL_DEFINE3(setitimer, int, which, struct itimerval __user *, value,
-		struct itimerval __user *, ovalue)
-{
-	struct itimerval set_buffer, get_buffer;
-	int error;
-
-	if (value) {
-		if(copy_from_user(&set_buffer, value, sizeof(set_buffer)))
-			return -EFAULT;
-	} else {
-		memset(&set_buffer, 0, sizeof(set_buffer));
-		printk_once(KERN_WARNING "%s calls setitimer() with new_value NULL pointer."
-			    " Misfeature support will be removed\n",
-			    current->comm);
-	}
-
-	error = do_setitimer(which, &set_buffer, ovalue ? &get_buffer : NULL);
-	if (error || !ovalue)
-		return error;
-
-	if (copy_to_user(ovalue, &get_buffer, sizeof(get_buffer)))
-		return -EFAULT;
-	return 0;
-}