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| author |   Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-03-13 12:21:27 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-03-31 14:52:52 +0200 |
| commit | 7f1e2ca9f04b02794597f60e7b1d43f0a1317939 (patch) | |
| tree | dad1d80ab4232f3ca12d7ff9a58f0dc76133dab1 /include/linux/interrupt.h | |
| parent | Merge branch 'linus' into locking-for-linus (diff) | |
| download | wireguard-linux-7f1e2ca9f04b02794597f60e7b1d43f0a1317939.tar.xz wireguard-linux-7f1e2ca9f04b02794597f60e7b1d43f0a1317939.zip | |
hrtimer: fix rq->lock inversion (again)
It appears I inadvertly introduced rq->lock recursion to the
hrtimer_start() path when I delegated running already expired
timers to softirq context.
This patch fixes it by introducing a __hrtimer_start_range_ns()
method that will not use raise_softirq_irqoff() but
__raise_softirq_irqoff() which avoids the wakeup.
It then also changes schedule() to check for pending softirqs and
do the wakeup then, I'm not quite sure I like this last bit, nor
am I convinced its really needed.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: paulus@samba.org
LKML-Reference: <20090313112301.096138802@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/interrupt.h')
| -rw-r--r-- | include/linux/interrupt.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index c68bffd182bb..4528bf70866a 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -294,6 +294,7 @@ extern void softirq_init(void); #define __raise_softirq_irqoff(nr) do { or_softirq_pending(1UL << (nr)); } while (0) extern void raise_softirq_irqoff(unsigned int nr); extern void raise_softirq(unsigned int nr); +extern void wakeup_softirqd(void); /* This is the worklist that queues up per-cpu softirq work. * |