On 06/06/07, john stultz <[EMAIL PROTECTED]> wrote:
--- 2.6-rt.orig/kernel/softirq.c 2007-06-05 18:30:54.000000000 -0700 +++ 2.6-rt/kernel/softirq.c 2007-06-05 18:36:44.000000000 -0700 @@ -544,10 +544,17 @@ static void inline __tasklet_common_schedule(struct tasklet_struct *t, struct tasklet_head *head, unsigned int nr) { if (tasklet_trylock(t)) { - WARN_ON(t->next != NULL); - t->next = head->list; - head->list = t; - raise_softirq_irqoff(nr); + /* We may have been preempted before tasklet_trylock + * and __tasklet_action may have already run. + * So double check the sched bit while the takslet
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