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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2020-03-21 12:26:03 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-03-21 16:00:24 +0100 |
| commit | 49915ac35ca7b07c54295a72d905be5064afb89e (patch) | |
| tree | da7e2b9c50d6ecdfa94db8b0d409fcb1527681eb /kernel/irq_work.c | |
| parent | 40db173965c05a1d803451240ed41707d5bd978d (diff) | |
| download | linux-49915ac35ca7b07c54295a72d905be5064afb89e.tar.gz linux-49915ac35ca7b07c54295a72d905be5064afb89e.tar.bz2 linux-49915ac35ca7b07c54295a72d905be5064afb89e.zip | |
lockdep: Annotate irq_work
Mark irq_work items with IRQ_WORK_HARD_IRQ which should be invoked in
hardirq context even on PREEMPT_RT. IRQ_WORK without this flag will be
invoked in softirq context on PREEMPT_RT.
Set ->irq_config to 1 for the IRQ_WORK items which are invoked in softirq
context so lockdep knows that these can safely acquire a spinlock_t.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200321113242.643576700@linutronix.de
Diffstat (limited to 'kernel/irq_work.c')
| -rw-r--r-- | kernel/irq_work.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/irq_work.c b/kernel/irq_work.c index 828cc30774bc..48b5d1b6af4d 100644 --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -153,7 +153,9 @@ static void irq_work_run_list(struct llist_head *list) */ flags = atomic_fetch_andnot(IRQ_WORK_PENDING, &work->flags); + lockdep_irq_work_enter(work); work->func(work); + lockdep_irq_work_exit(work); /* * Clear the BUSY bit and return to the free state if * no-one else claimed it meanwhile. |