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sparc: Switch do_timer() to xtime_update()

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xtime_update() takes the xtime_lock itself.

pcic_clear_clock_irq() and clear_clock_irq do not need
to be protected by xtime_lock.

Signed-off-by: Torben Hohn <torbenh@gmx.de>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: johnstul@us.ibm.com
Cc: hch@infradead.org
Cc: yong.zhang0@gmail.com
LKML-Reference: <20110127150022.23248.80369.stgit@localhost>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Torben Hohn 2011-01-27 16:00:22 +01:00 committed by Thomas Gleixner
parent bb1dfc1cf6
commit 4ea1b72551
2 changed files with 3 additions and 10 deletions
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4
arch/sparc/kernel/pcic.c
View File

@ -700,10 +700,8 @@ static void pcic_clear_clock_irq(void)
static irqreturn_t pcic_timer_handler (int irq, void *h)
{
write_seqlock(&xtime_lock); /* Dummy, to show that we remember */
pcic_clear_clock_irq();
do_timer(1);
write_sequnlock(&xtime_lock);
xtime_update(1);
#ifndef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));
#endif

9
arch/sparc/kernel/time_32.c
View File

@ -85,7 +85,7 @@ int update_persistent_clock(struct timespec now)
/*
* timer_interrupt() needs to keep up the real-time clock,
* as well as call the "do_timer()" routine every clocktick
* as well as call the "xtime_update()" routine every clocktick
*/
#define TICK_SIZE (tick_nsec / 1000)
@ -96,14 +96,9 @@ static irqreturn_t timer_interrupt(int dummy, void *dev_id)
profile_tick(CPU_PROFILING);
#endif
/* Protect counter clear so that do_gettimeoffset works */
write_seqlock(&xtime_lock);
clear_clock_irq();
do_timer(1);
write_sequnlock(&xtime_lock);
xtime_update(1);
#ifndef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));