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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-01-28 10:16:37 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-01-28 10:17:12 +0000
commit193c3cc12583344be01206078d9ad3fec5dbc397 (patch)
tree97eb5d6ec88969d21fbf0c5815e3b77e8e1f4aaf /arch/arm/kernel/time.c
parent6232be32afa121628c72291ce7eaa24a639905c2 (diff)
downloadlinux-193c3cc12583344be01206078d9ad3fec5dbc397.tar.bz2
[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/kernel/time.c')
-rw-r--r--arch/arm/kernel/time.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index e59b5b84168d..b5867eca1d0b 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -325,7 +325,9 @@ void timer_tick(void)
profile_tick(CPU_PROFILING);
do_leds();
do_set_rtc();
+ write_seqlock(&xtime_lock);
do_timer(1);
+ write_sequnlock(&xtime_lock);
#ifndef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));
#endif