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completion: Use lockdep_assert_RT_in_threaded_ctx() in complete_all()

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The warning was intended to spot complete_all() users from hardirq
context on PREEMPT_RT. The warning as-is will also trigger in interrupt
handlers, which are threaded on PREEMPT_RT, which was not intended.

Use lockdep_assert_RT_in_threaded_ctx() which triggers in non-preemptive
context on PREEMPT_RT.

Fixes: a5c6234e10 ("completion: Use simple wait queues")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200323152019.4qjwluldohuh3by5@linutronix.de
This commit is contained in:
Sebastian Siewior
2020-03-23 16:20:19 +01:00
committed by Peter Zijlstra
parent d53f2b62fc
commit 8bf6c677dd
2 changed files with 16 additions and 1 deletions
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2
kernel/sched/completion.c
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@@ -58,7 +58,7 @@ void complete_all(struct completion *x)
{
unsigned long flags;
WARN_ON(irqs_disabled());
lockdep_assert_RT_in_threaded_ctx();
raw_spin_lock_irqsave(&x->wait.lock, flags);
x->done = UINT_MAX;