diff options
| author | Andi Kleen <ak@suse.de> | 2006-03-25 16:29:31 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 09:10:53 -0800 |
| commit | 9ede6b0945223d1e353501f41b988a3db56b4e27 (patch) | |
| tree | 40ed5154dc041977e7e19da501eceee1e24ac369 | |
| parent | 51f62e186b78f8743246a349b09be370c8735479 (diff) | |
[PATCH] x86_64: Don't need to read PIT in timer handler when PM timer is used
The PM timer path through main_timer_handler doesn't need
the delay variable because it figures it out in a different way.
Don't try to read it from the PIT. With stopped PIT timer
it is even useless.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/x86_64/kernel/time.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c index ee5ce3d3cbc..86039baaaf1 100644 --- a/arch/x86_64/kernel/time.c +++ b/arch/x86_64/kernel/time.c @@ -354,7 +354,7 @@ void main_timer_handler(struct pt_regs *regs) { static unsigned long rtc_update = 0; unsigned long tsc; - int delay, offset = 0, lost = 0; + int delay = 0, offset = 0, lost = 0; /* * Here we are in the timer irq handler. We have irqs locally disabled (so we @@ -375,7 +375,7 @@ void main_timer_handler(struct pt_regs *regs) */ offset = hpet_readl(HPET_T0_CMP) - hpet_tick; delay = hpet_readl(HPET_COUNTER) - offset; - } else { + } else if (!pmtmr_ioport) { spin_lock(&i8253_lock); outb_p(0x00, 0x43); delay = inb_p(0x40); |