linux-kernel - Re: [PATCH 1/6] regulator: core: simplify regulator_lock

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Message-ID: <CAD=FV=XEDCCOV9S_Vf45nee7-xqJLXmQqTp8FAM9v0jQ9X5e-g@mail.gmail.com>
Date:   Mon, 21 Aug 2023 09:50:06 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Michał Mirosław <mirq-linux@...e.qmqm.pl>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        Dmitry Osipenko <digetx@...il.com>
Subject: Re: [PATCH 1/6] regulator: core: simplify regulator_lock_nested()

Hi,

On Sat, Aug 19, 2023 at 3:46 PM Michał Mirosław <mirq-linux@...e.qmqm.pl> wrote:
>
> `lock` is only false when the `rdev` is already locked and the owner is
> `current`. In this case `ret` is always zero. By removing `lock`, we
> thus remove `mutex_owner` write avoidance, but make the code flow more
> understandable.
>
> Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
> ---
>  drivers/regulator/core.c | 12 ++----------
>  1 file changed, 2 insertions(+), 10 deletions(-)

Agreed that this looks to be equivalent and easier to understand.

Reviewed-by: Douglas Anderson <dianders@...omium.org>