Re: padata: Is padata_find_next() thread-safe?

[Herbert Xu]

On Tue, Nov 04, 2025 at 08:44:53PM +0900, Tetsuo Handa wrote:
> syzbot is reporting possibility of recursive locking at
> https://syzkaller.appspot.com/bug?extid=bd936ccd4339cea66e6b .
> If this is a false positive report, the fix will be as simple as

Yes it's a false positive as reorder->lock is never the same as
squeue->serial.lock.

However, they both have the same data type which is why lockdep
is confused.

Please provide a patch that sets the class for one of them to
something different.  For example, change the lockdep class for
reorder->lock using lockdep_set_class and the problem should go
away.

Thanks,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
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