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mn10300: Switch do_timer() to xtimer_update()

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Only one CPU gets the timer interrupt so mn10300_last_tsc does not
need to be protected by xtime lock. Remove xtime lovking and use
xtime_update() which does the locking itself.

Signed-off-by: Torben Hohn <torbenh@gmx.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
LKML-Reference: <20110127150011.23248.62040.stgit@localhost>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Torben Hohn 2011-01-27 16:00:12 +01:00 committed by Thomas Gleixner
parent 0606f422b4
commit 22b7fcdae5
1 changed files with 1 additions and 5 deletions
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6
arch/mn10300/kernel/time.c
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@ -104,8 +104,6 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
unsigned tsc, elapse;
irqreturn_t ret;
write_seqlock(&xtime_lock);
while (tsc = get_cycles(),
elapse = tsc - mn10300_last_tsc, /* time elapsed since last
* tick */
@ -114,11 +112,9 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
mn10300_last_tsc += MN10300_TSC_PER_HZ;
/* advance the kernel's time tracking system */
do_timer(1);
xtime_update(1);
}
write_sequnlock(&xtime_lock);
ret = local_timer_interrupt();
#ifdef CONFIG_SMP
send_IPI_allbutself(LOCAL_TIMER_IPI);