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/os-Linux/signal.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'arch/um/os-Linux/signal.c') diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 53593c8b9c3..fbad174775e 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c @@ -120,7 +120,6 @@ void (*handlers[_NSIG])(int sig, struct sigcontext *sc); void handle_signal(int sig, struct sigcontext *sc) { unsigned long pending = 1UL << sig; - int timer = switch_timers(0); do { int nested, bail; @@ -157,8 +156,6 @@ void handle_signal(int sig, struct sigcontext *sc) if (!nested) pending = from_irq_stack(nested); } while (pending); - - switch_timers(timer); } extern void hard_handler(int sig); -- cgit v1.2.3