lockdep/selftest: Add spin_nest_lock test

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Add a self test case to test the behavior for the following case:

	lock(A);
	lock_nest_lock(C1, A);
	lock(B);
	lock_nest_lock(C2, A);

This is a reproducer for a problem[1] reported by Chris Wilson, and is
helpful to prevent this.

[1]: https://lore.kernel.org/lkml/160390684819.31966.12048967113267928793@build.alporthouse.com/

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201102053743.450459-2-boqun.feng@gmail.com

...

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Boqun Feng 2020-11-02 13:37:42 +08:00 • committed by Peter Zijlstra

parent a2e9ae58d5

commit e04ce676e7

1 changed files with 17 additions and 0 deletions

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lib/locking-selftest.c

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