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Merge branch 'irq/urgent-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into irq/urgent 

Pull a hardirq-nesting fix from Frederic Weisbecker.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2013-10-02 07:53:01 +02:00
parent f927318840 ded7975475
commit 0d119fb576
1 changed files with 12 additions and 3 deletions
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15
kernel/softirq.c
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@ -328,10 +328,19 @@ void irq_enter(void)
static inline void invoke_softirq(void)
{
if (!force_irqthreads)
__do_softirq();
else
if (!force_irqthreads) {
/*
* We can safely execute softirq on the current stack if
* it is the irq stack, because it should be near empty
* at this stage. But we have no way to know if the arch
* calls irq_exit() on the irq stack. So call softirq
* in its own stack to prevent from any overrun on top
* of a potentially deep task stack.
*/
do_softirq();
} else {
wakeup_softirqd();
}
}
static inline void tick_irq_exit(void)