[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-pnx4008/time.c b/arch/arm/mach-pnx4008/time.c
index 67e05f005a6b..6d4ca8fc0cb4 100644
--- a/arch/arm/mach-pnx4008/time.c
+++ b/arch/arm/mach-pnx4008/time.c
@@ -51,8 +51,6 @@ static irqreturn_t pnx4008_timer_interrupt(int irq, void *dev_id)
 {
         if (__raw_readl(HSTIM_INT) & MATCH0_INT) {
 
-                write_seqlock(&xtime_lock);
-
                 do {
                         timer_tick();
 
@@ -73,8 +71,6 @@ static irqreturn_t pnx4008_timer_interrupt(int irq, void *dev_id)
                 } while ((signed)
                          (__raw_readl(HSTIM_MATCH0) -
                           __raw_readl(HSTIM_COUNTER)) < 0);
-
-                write_sequnlock(&xtime_lock);
         }
 
         return IRQ_HANDLED;