Re: [perf] lockdep warning between cpu_add_remove_lock and &dev->mutex.

[Peter Zijlstra]

On Mon, Jan 23, 2023 at 11:10:57PM +0900, Tetsuo Handa wrote:

> After applying your diff, lockdep message changed like below. Is this
> the reason commit 1704f47b50b5 ("lockdep: Add novalidate class for
> dev->mutex conversion") was applied?

No, reason was device probing itself. There should be a thread about
that with Alan Stern some 15 years ago or so.

I'll try and have a look at the new splat later today.