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Commit cde50a67 authored by Levin, Alexander (Sasha Levin)'s avatar Levin, Alexander (Sasha Levin) Committed by Ingo Molnar
Browse files

locking/rtmutex: Don't initialize lockdep when not required 



pi_mutex isn't supposed to be tracked by lockdep, but just
passing NULLs for name and key will cause lockdep to spew a
warning and die, which is not what we want it to do.

Skip lockdep initialization if the caller passed NULLs for
name and key, suggesting such initialization isn't desired.

Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: f5694788 ("rt_mutex: Add lockdep annotations")
Link: http://lkml.kernel.org/r/20170618140548.4763-1-alexander.levin@verizon.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 018956d6

kernel/locking/rtmutex.c

+2 −1
Original line number Diff line number Diff line
@@ -1661,6 +1661,7 @@ void __rt_mutex_init(struct rt_mutex *lock, const char *name, 
	lock->waiters = RB_ROOT;

	lock->waiters_leftmost = NULL;



	if (name && key)

		debug_rt_mutex_init(lock, name, key);

}

EXPORT_SYMBOL_GPL(__rt_mutex_init);