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lockdep: Fix wait-type for empty stack

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[ Upstream commit f8b298cc39f0619544c607eaef09fd0b2afd10f3 ]

Even the very first lock can violate the wait-context check, consider
the various IRQ contexts.

Fixes: de8f5e4f2d ("lockdep: Introduce wait-type checks")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20210617190313.256987481@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Peter Zijlstra 2021-06-17 20:57:18 +02:00 committed by Greg Kroah-Hartman
parent ca47a4fa89
commit fca9e784a3
1 changed files with 1 additions and 1 deletions
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kernel/locking/lockdep.c
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@ -4626,7 +4626,7 @@ static int check_wait_context(struct task_struct *curr, struct held_lock *next)
short curr_inner; short curr_inner;
int depth; int depth;
if (!curr->lockdep_depth || !next_inner || next->trylock) if (!next_inner || next->trylock)
return 0; return 0;
if (!next_outer) if (!next_outer)