From b160fb6309dc907cbd8849e549d83badb86dd35b Mon Sep 17 00:00:00 2001 From: Jeff Dike Date: Tue, 16 Oct 2007 01:27:26 -0700 Subject: uml: eliminate interrupts in the idle loop Now, the idle loop now longer needs SIGALRM firing - it can just sleep for the requisite amount of time and fake a timer interrupt when it finishes. Any use of ITIMER_REAL now goes away. disable_timer only turns off ITIMER_VIRTUAL. switch_timers is no longer needed, so it, and all calls, goes away. disable_timer now returns the amount of time remaining on the timer. default_idle uses this to tell idle_sleep how long to sleep. idle_sleep will call alarm_handler if nanosleep returns 0, which is the case if it didn't return early due to an interrupt. Otherwise, it just returns. Signed-off-by: Jeff Dike Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/include/os.h | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'arch/um/include') diff --git a/arch/um/include/os.h b/arch/um/include/os.h index e4f2fe1..91642e4 100644 --- a/arch/um/include/os.h +++ b/arch/um/include/os.h @@ -251,11 +251,10 @@ extern void os_dump_core(void); /* time.c */ #define BILLION (1000 * 1000 * 1000) -extern int switch_timers(int to_real); -extern void idle_sleep(int secs); +extern void idle_sleep(unsigned long long nsecs); extern int set_interval(void); extern int timer_one_shot(int ticks); -extern void disable_timer(void); +extern unsigned long long disable_timer(void); extern void uml_idle_timer(void); extern unsigned long long os_nsecs(void); -- cgit v1.1