linux-kernel - Re: [PATCH] regulator: simplify nested locking

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Message-ID: <ZOEh591udUYSJiGY@qmqm.qmqm.pl>
Date:   Sat, 19 Aug 2023 22:11:19 +0200
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Dmitry Osipenko <digetx@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regulator: simplify nested locking

On Thu, Aug 17, 2023 at 08:52:05PM +0200, Michał Mirosław wrote:
> Simplify regulator locking by removing locking around locking. rdev->ref
> is now accessed only when the lock is taken.
> 
> This patch depends on 12235da8c80a ("kernel/locking: Add context to
> ww_mutex_trylock()").

Please ignore for now: this somehow works with DEBUG_LOCK_ALLOC, but
fails without it. I'll post an extracted simplification part of the code
to have it easier to review.

Best Regards
Michał Mirosław