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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-01-28 05:16:37 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-01-28 05:17:12 -0500
commit193c3cc12583344be01206078d9ad3fec5dbc397 (patch)
tree97eb5d6ec88969d21fbf0c5815e3b77e8e1f4aaf /arch/arm/mach-realview
parent6232be32afa121628c72291ce7eaa24a639905c2 (diff)
[ARM] Fix timer damage from d3d74453c34f8fd87674a8cf5b8a327c68f22e99
Move the xtime write mode seqlock into timer_tick(), so it only surrounds the call to do_timer(). This avoids a deadlock in update_process_times() ... hrtimer_get_softirq_time() which tries to get a read mode seqlock on xtime, thereby preventing booting. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-realview')
-rw-r--r--arch/arm/mach-realview/core.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index c7f1b44da40d..61d70218f1e8 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -530,8 +530,6 @@ static unsigned long realview_gettimeoffset(void)
530 */ 530 */
531static irqreturn_t realview_timer_interrupt(int irq, void *dev_id) 531static irqreturn_t realview_timer_interrupt(int irq, void *dev_id)
532{ 532{
533 write_seqlock(&xtime_lock);
534
535 // ...clear the interrupt 533 // ...clear the interrupt
536 writel(1, TIMER0_VA_BASE + TIMER_INTCLR); 534 writel(1, TIMER0_VA_BASE + TIMER_INTCLR);
537 535
@@ -542,8 +540,6 @@ static irqreturn_t realview_timer_interrupt(int irq, void *dev_id)
542 update_process_times(user_mode(get_irq_regs())); 540 update_process_times(user_mode(get_irq_regs()));
543#endif 541#endif
544 542
545 write_sequnlock(&xtime_lock);
546
547 return IRQ_HANDLED; 543 return IRQ_HANDLED;
548} 544}
549 545