diff options
| author | Jeff Dike <jdike@addtoit.com> | 2007-10-16 12:27:26 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 20:43:08 +0400 |
| commit | b160fb6309dc907cbd8849e549d83badb86dd35b (patch) | |
| tree | b4a69cc1b96b4aa83aa971c35af5a23e5e07b56f /arch/um/os-Linux/signal.c | |
| parent | d2753a6d199791a6abc75d9f657e3457fe61705f (diff) | |
| download | linux-b160fb6309dc907cbd8849e549d83badb86dd35b.tar.xz | |
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 <jdike@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/os-Linux/signal.c')
| -rw-r--r-- | arch/um/os-Linux/signal.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 53593c8b9c34..fbad174775ee 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); |