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[ARM] 3554/1: ARM: Fix dyntick locking

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Patch from Tony Lindgren

This patch fixes some dyntick locking issues on ARM as pointed
out by Russell King.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Tony Lindgren
2006-06-18 16:26:58 +01:00
committed by Russell King
parent 36fe6a83b4
commit ebc67da65f
3 changed files with 20 additions and 9 deletions
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4
arch/arm/kernel/irq.c
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@@ -342,10 +342,10 @@ __do_irq(unsigned int irq, struct irqaction *action, struct pt_regs *regs)
#ifdef CONFIG_NO_IDLE_HZ
if (!(action->flags & SA_TIMER) && system_timer->dyn_tick != NULL) {
write_seqlock(&xtime_lock);
spin_lock(&system_timer->dyn_tick->lock);
if (system_timer->dyn_tick->state & DYN_TICK_ENABLED)
system_timer->dyn_tick->handler(irq, 0, regs);
write_sequnlock(&xtime_lock);
spin_unlock(&system_timer->dyn_tick->lock);
}
#endif