summaryrefslogtreecommitdiff
path: root/arch/um/os-Linux/signal.c
diff options
context:
space:
mode:
authorJeff Dike <jdike@addtoit.com>2007-10-16 12:27:26 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 20:43:08 +0400
commitb160fb6309dc907cbd8849e549d83badb86dd35b (patch)
treeb4a69cc1b96b4aa83aa971c35af5a23e5e07b56f /arch/um/os-Linux/signal.c
parentd2753a6d199791a6abc75d9f657e3457fe61705f (diff)
downloadlinux-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.c3
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);