[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>

1 files changed, 0 insertions, 4 deletions

diff --git a/arch/arm/mach-mx3/time.c b/arch/arm/mach-mx3/time.c
index e81fb5c5d7c3..fb565c98dbfb 100644
--- a/arch/arm/mach-mx3/time.c
+++ b/arch/arm/mach-mx3/time.c
@@ -45,8 +45,6 @@ static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
 {
         unsigned int next_match;
 
-        write_seqlock(&xtime_lock);
-
         if (__raw_readl(MXC_GPT_GPTSR) & GPTSR_OF1) {
                 do {
                         timer_tick();
@@ -57,8 +55,6 @@ static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
                                        __raw_readl(MXC_GPT_GPTCNT)) <= 0);
         }
 
-        write_sequnlock(&xtime_lock);
-
         return IRQ_HANDLED;
 }