linux-kernel - Re: [PATCH] lockdep: Do no validate wait context for novalidate class

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Message-ID: <20200820123859.GS2674@hirez.programming.kicks-ass.net>
Date:   Thu, 20 Aug 2020 14:38:59 +0200
From:   peterz@...radead.org
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Will Deacon <will@...nel.org>, tglx@...utronix.de,
        kent.overstreet@...il.com
Subject: Re: [PATCH] lockdep: Do no validate wait context for novalidate class

On Thu, Aug 20, 2020 at 01:43:48PM +0200, Sebastian Andrzej Siewior wrote:
> On 2020-08-20 13:40:36 [+0200], peterz@...radead.org wrote:
> > Anyway, all 3 users should have the same wait context, so where is the
> > actual problem?
> 
> I have one in RT which is a per-CPU spinlock within local_bh_disable()
> to act as a per-CPU BLK like mainline.

Then can we get to see that code and an explanation for what the problem
is and why it is still correct?

Because as is, this patch isn't needed.