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Commit 56fc1870 authored by Johannes Berg's avatar Johannes Berg Committed by Richard Weinberger
Browse files

um: Timer code cleanup 



There are some unused functions, and some others that have
unused arguments; clean up the timer code a bit.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent fcd242c6

arch/um/include/shared/os.h

+3 −5
Original line number Diff line number Diff line
@@ -250,15 +250,13 @@ extern void os_warn(const char *fmt, ...) 


/* time.c */

extern void os_idle_sleep(unsigned long long nsecs);

extern int os_timer_create(void* timer);

extern int os_timer_set_interval(void* timer, void* its);

extern int os_timer_create(void);

extern int os_timer_set_interval(void);

extern int os_timer_one_shot(unsigned long ticks);

extern long long os_timer_disable(void);

extern long os_timer_remain(void* timer);

extern void os_timer_disable(void);

extern void uml_idle_timer(void);

extern long long os_persistent_clock_emulation(void);

extern long long os_nsecs(void);

extern long long os_vnsecs(void);



/* skas/mem.c */

extern long run_syscall_stub(struct mm_id * mm_idp,

arch/um/kernel/time.c

+2 −2
Original line number Diff line number Diff line
@@ -37,7 +37,7 @@ static int itimer_shutdown(struct clock_event_device *evt) 


static int itimer_set_periodic(struct clock_event_device *evt)

{

	os_timer_set_interval(NULL, NULL);

	os_timer_set_interval();

	return 0;

}
@@ -107,7 +107,7 @@ static void __init um_timer_setup(void) 
		printk(KERN_ERR "register_timer : request_irq failed - "

		       "errno = %d\n", -err);



	err = os_timer_create(NULL);

	err = os_timer_create();

	if (err != 0) {

		printk(KERN_ERR "creation of timer failed - errno = %d\n", -err);

		return;

arch/um/os-Linux/time.c

+26 −93
Original line number Diff line number Diff line
@@ -26,11 +26,11 @@ static inline long long timeval_to_ns(const struct timeval *tv) 


static inline long long timespec_to_ns(const struct timespec *ts)

{

	return ((long long) ts->tv_sec * UM_NSEC_PER_SEC) +

		ts->tv_nsec;

	return ((long long) ts->tv_sec * UM_NSEC_PER_SEC) + ts->tv_nsec;

}



long long os_persistent_clock_emulation (void) {

long long os_persistent_clock_emulation(void)

{

	struct timespec realtime_tp;



	clock_gettime(CLOCK_REALTIME, &realtime_tp);
@@ -40,94 +40,45 @@ long long os_persistent_clock_emulation (void) { 
/**

 * os_timer_create() - create an new posix (interval) timer

 */

int os_timer_create(void* timer) {



	timer_t* t = timer;



	if(t == NULL) {

		t = &event_high_res_timer;

	}

int os_timer_create(void)

{

	timer_t *t = &event_high_res_timer;



	if (timer_create(

		CLOCK_MONOTONIC,

		NULL,

		t) == -1) {

	if (timer_create(CLOCK_MONOTONIC, NULL, t) == -1)

		return -1;

	}



	return 0;

}



int os_timer_set_interval(void* timer, void* i)

int os_timer_set_interval(void)

{

	struct itimerspec its;

	unsigned long long nsec;

	timer_t* t = timer;

	struct itimerspec* its_in = i;



	if(t == NULL) {

		t = &event_high_res_timer;

	}



	nsec = UM_NSEC_PER_SEC / UM_HZ;



	if(its_in != NULL) {

		its.it_value.tv_sec = its_in->it_value.tv_sec;

		its.it_value.tv_nsec = its_in->it_value.tv_nsec;

	} else {

	its.it_value.tv_sec = 0;

	its.it_value.tv_nsec = nsec;

	}



	its.it_interval.tv_sec = 0;

	its.it_interval.tv_nsec = nsec;



	if(timer_settime(*t, 0, &its, NULL) == -1) {

	if (timer_settime(event_high_res_timer, 0, &its, NULL) == -1)

		return -errno;

	}



	return 0;

}



/**

 * os_timer_remain() - returns the remaining nano seconds of the given interval

 *                     timer

 * Because this is the remaining time of an interval timer, which correspondends

 * to HZ, this value can never be bigger than one second. Just

 * the nanosecond part of the timer is returned.

 * The returned time is relative to the start time of the interval timer.

 * Return an negative value in an error case.

 */

long os_timer_remain(void* timer)

{

	struct itimerspec its;

	timer_t* t = timer;



	if(t == NULL) {

		t = &event_high_res_timer;

	}



	if(timer_gettime(t, &its) == -1) {

		return -errno;

	}



	return its.it_value.tv_nsec;

}



int os_timer_one_shot(unsigned long ticks)

{

	struct itimerspec its;

	unsigned long long nsec;

	unsigned long sec;



    nsec = (ticks + 1);

    sec = nsec / UM_NSEC_PER_SEC;

	nsec = nsec % UM_NSEC_PER_SEC;

	unsigned long long nsec = ticks + 1;

	struct itimerspec its = {

		.it_value.tv_sec = nsec / UM_NSEC_PER_SEC,

		.it_value.tv_nsec = nsec % UM_NSEC_PER_SEC,



	its.it_value.tv_sec = nsec / UM_NSEC_PER_SEC;

	its.it_value.tv_nsec = nsec;



	its.it_interval.tv_sec = 0;

	its.it_interval.tv_nsec = 0; // we cheat here

		.it_interval.tv_sec = 0,

		.it_interval.tv_nsec = 0, // we cheat here

	};



	timer_settime(event_high_res_timer, 0, &its, NULL);

	return 0;
@@ -135,24 +86,13 @@ int os_timer_one_shot(unsigned long ticks) 


/**

 * os_timer_disable() - disable the posix (interval) timer

 * Returns the remaining interval timer time in nanoseconds

 */

long long os_timer_disable(void)

void os_timer_disable(void)

{

	struct itimerspec its;



	memset(&its, 0, sizeof(struct itimerspec));

	timer_settime(event_high_res_timer, 0, &its, &its);



	return its.it_value.tv_sec * UM_NSEC_PER_SEC + its.it_value.tv_nsec;

}



long long os_vnsecs(void)

{

	struct timespec ts;



	clock_gettime(CLOCK_PROCESS_CPUTIME_ID,&ts);

	return timespec_to_ns(&ts);

	timer_settime(event_high_res_timer, 0, &its, NULL);

}



long long os_nsecs(void)
@@ -169,21 +109,14 @@ long long os_nsecs(void) 
 */

void os_idle_sleep(unsigned long long nsecs)

{

	struct timespec ts;



	if (nsecs <= 0) {

		return;

	}



	ts = ((struct timespec) {

	struct timespec ts = {

		.tv_sec  = nsecs / UM_NSEC_PER_SEC,

		.tv_nsec = nsecs % UM_NSEC_PER_SEC

	});

	};



	/*

	 * Relay the signal if clock_nanosleep is interrupted.

	 */

	if (clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL)) {

	if (clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL))

		deliver_alarm();

}
 
}