lockdep: Fix wait-type for empty stack

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) <[email protected]>
Tested-by: Joerg Roedel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

kernel/locking/lockdep.c

@@ -4688,7 +4688,7 @@ static int check_wait_context(struct task_struct *curr, struct held_lock *next)
 	u8 curr_inner;
 	int depth;
 
-	if (!curr->lockdep_depth || !next_inner || next->trylock)
+	if (!next_inner || next->trylock)
 		return 0;
 
 	if (!next_outer)