diff options
| author | Jeff Dike <jdike@addtoit.com> | 2007-10-16 01:27:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:08 -0700 |
| commit | b160fb6309dc907cbd8849e549d83badb86dd35b (patch) | |
| tree | b4a69cc1b96b4aa83aa971c35af5a23e5e07b56f /arch/um/include | |
| parent | d2753a6d199791a6abc75d9f657e3457fe61705f (diff) | |
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/include')
| -rw-r--r-- | arch/um/include/os.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/um/include/os.h b/arch/um/include/os.h index e4f2fe11ba50..91642e4137d7 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); |