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[ARM] xtime_seqlock: fix more ARM machines for xtime deadlocking 

move update_process_times() out from under xtime_lock.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Peter Zijlstra 2008-02-01 21:27:02 +00:00 committed by Russell King
parent 2f65baff3a
commit 66a2c077c3
4 changed files with 0 additions and 11 deletions
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2
arch/arm/common/time-acorn.c
View File

@ -69,9 +69,7 @@ void __init ioctime_init(void)
static irqreturn_t
ioc_timer_interrupt(int irq, void *dev_id)
{
write_seqlock(&xtime_lock);
timer_tick();
write_sequnlock(&xtime_lock);
return IRQ_HANDLED;
}

3
arch/arm/mach-at91/at91sam926x_time.c
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@ -49,8 +49,6 @@ static irqreturn_t at91sam926x_timer_interrupt(int irq, void *dev_id)
volatile long nr_ticks;
if (at91_sys_read(AT91_PIT_SR) & AT91_PIT_PITS) { /* This is a shared interrupt */
write_seqlock(&xtime_lock);
/* Get number to ticks performed before interrupt and clear PIT interrupt */
nr_ticks = PIT_PICNT(at91_sys_read(AT91_PIT_PIVR));
do {
@ -58,7 +56,6 @@ static irqreturn_t at91sam926x_timer_interrupt(int irq, void *dev_id)
nr_ticks--;
} while (nr_ticks);
write_sequnlock(&xtime_lock);
return IRQ_HANDLED;
} else
return IRQ_NONE; /* not handled */

4
arch/arm/plat-iop/time.c
View File

@ -57,8 +57,6 @@ unsigned long iop_gettimeoffset(void)
static irqreturn_t
iop_timer_interrupt(int irq, void *dev_id)
{
write_seqlock(&xtime_lock);
write_tisr(1);
while ((signed long)(next_jiffy_time - read_tcr1())
@ -67,8 +65,6 @@ iop_timer_interrupt(int irq, void *dev_id)
next_jiffy_time -= ticks_per_jiffy;
}
write_sequnlock(&xtime_lock);
return IRQ_HANDLED;
}

2
arch/arm/plat-s3c24xx/time.c
View File

@ -130,9 +130,7 @@ static unsigned long s3c2410_gettimeoffset (void)
static irqreturn_t
s3c2410_timer_interrupt(int irq, void *dev_id)
{
write_seqlock(&xtime_lock);
timer_tick();
write_sequnlock(&xtime_lock);
return IRQ_HANDLED;
}