From 3618886f645c2ede45742d3e3d22a96b2ee2f527 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Wed, 31 Aug 2005 09:42:14 +0100 Subject: [PATCH] [ARM] 2857/2: Dynamic tick - fix OOPS if configured and not provided Patch from Ben Dooks timer_dyn_reprogram() fails with an OOPS if the configuration for CONFIG_NO_IDLE_HZ is enabled, and the system has no support for it. Signed-off-by: Ben Dooks Signed-off-by: Russell King --- arch/arm/kernel/time.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c index 1b7fcd50c3e..8880482dcbf 100644 --- a/arch/arm/kernel/time.c +++ b/arch/arm/kernel/time.c @@ -433,10 +433,12 @@ void timer_dyn_reprogram(void) { struct dyn_tick_timer *dyn_tick = system_timer->dyn_tick; - write_seqlock(&xtime_lock); - if (dyn_tick->state & DYN_TICK_ENABLED) - dyn_tick->reprogram(next_timer_interrupt() - jiffies); - write_sequnlock(&xtime_lock); + if (dyn_tick) { + write_seqlock(&xtime_lock); + if (dyn_tick->state & DYN_TICK_ENABLED) + dyn_tick->reprogram(next_timer_interrupt() - jiffies); + write_sequnlock(&xtime_lock); + } } static ssize_t timer_show_dyn_tick(struct sys_device *dev, char *buf) -- 2.20.1