[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 <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -433,10 +433,12 @@ void timer_dyn_reprogram(void)
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{
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struct dyn_tick_timer *dyn_tick = system_timer->dyn_tick;
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write_seqlock(&xtime_lock);
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if (dyn_tick->state & DYN_TICK_ENABLED)
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dyn_tick->reprogram(next_timer_interrupt() - jiffies);
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write_sequnlock(&xtime_lock);
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if (dyn_tick) {
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write_seqlock(&xtime_lock);
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if (dyn_tick->state & DYN_TICK_ENABLED)
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dyn_tick->reprogram(next_timer_interrupt() - jiffies);
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write_sequnlock(&xtime_lock);
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}
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}
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static ssize_t timer_show_dyn_tick(struct sys_device *dev, char *buf)
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