um: Pass nsecs to os timer functions

This makes the code clearer and lets the time travel patch have
the actual time used for these functions in just one place.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/include/shared/os.h

@@ -251,8 +251,8 @@ extern void os_warn(const char *fmt, ...)
 /* time.c */
 extern void os_idle_sleep(unsigned long long nsecs);
 extern int os_timer_create(void);
-extern int os_timer_set_interval(void);
-extern int os_timer_one_shot(unsigned long ticks);
+extern int os_timer_set_interval(unsigned long long nsecs);
+extern int os_timer_one_shot(unsigned long long nsecs);
 extern void os_timer_disable(void);
 extern void uml_idle_timer(void);
 extern long long os_persistent_clock_emulation(void);

arch/um/kernel/time.c

@@ -37,14 +37,14 @@ static int itimer_shutdown(struct clock_event_device *evt)
 
 static int itimer_set_periodic(struct clock_event_device *evt)
 {
-	os_timer_set_interval();
+	os_timer_set_interval(NSEC_PER_SEC / HZ);
 	return 0;
 }
 
 static int itimer_next_event(unsigned long delta,
 			     struct clock_event_device *evt)
 {
-	return os_timer_one_shot(delta);
+	return os_timer_one_shot(delta + 1);
 }
 
 static int itimer_one_shot(struct clock_event_device *evt)

arch/um/os-Linux/time.c

@@ -50,18 +50,15 @@ int os_timer_create(void)
 	return 0;
 }
 
-int os_timer_set_interval(void)
+int os_timer_set_interval(unsigned long long nsecs)
 {
 	struct itimerspec its;
-	unsigned long long nsec;
 
-	nsec = UM_NSEC_PER_SEC / UM_HZ;
+	its.it_value.tv_sec = nsecs / UM_NSEC_PER_SEC;
+	its.it_value.tv_nsec = nsecs % UM_NSEC_PER_SEC;
 
-	its.it_value.tv_sec = 0;
-	its.it_value.tv_nsec = nsec;
-
-	its.it_interval.tv_sec = 0;
-	its.it_interval.tv_nsec = nsec;
+	its.it_interval.tv_sec = nsecs / UM_NSEC_PER_SEC;
+	its.it_interval.tv_nsec = nsecs % UM_NSEC_PER_SEC;
 
 	if (timer_settime(event_high_res_timer, 0, &its, NULL) == -1)
 		return -errno;
@@ -69,12 +66,11 @@ int os_timer_set_interval(void)
 	return 0;
 }
 
-int os_timer_one_shot(unsigned long ticks)
+int os_timer_one_shot(unsigned long long nsecs)
 {
-	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,
+		.it_value.tv_sec = nsecs / UM_NSEC_PER_SEC,
+		.it_value.tv_nsec = nsecs % UM_NSEC_PER_SEC,
 
 		.it_interval.tv_sec = 0,
 		.it_interval.tv_nsec = 0, // we cheat here