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| author |   Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-01-28 10:16:37 +0000 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2008-01-28 10:17:12 +0000 |
| commit | 193c3cc12583344be01206078d9ad3fec5dbc397 (patch) | |
| tree | 97eb5d6ec88969d21fbf0c5815e3b77e8e1f4aaf /arch/arm/kernel/time.c | |
| parent | [ARM] 4763/1: pxa: fix pxa3xx_get_clk_frequency_khz() to return KHz (diff) | |
| download | linux-dev-193c3cc12583344be01206078d9ad3fec5dbc397.tar.xz linux-dev-193c3cc12583344be01206078d9ad3fec5dbc397.zip | |
[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.c | 2 |
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 |