linux-kernel - Re: [PATCH v2 01/10] devm-helpers: introduce devm_mutex

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Date:   Thu, 7 Dec 2023 14:02:29 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     George Stark <gnstark@...utedevices.com>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        Hans de Goede <hdegoede@...hat.com>,
        "pavel@....cz" <pavel@....cz>, "lee@...nel.org" <lee@...nel.org>,
        "vadimp@...dia.com" <vadimp@...dia.com>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "npiggin@...il.com" <npiggin@...il.com>,
        "mazziesaccount@...il.com" <mazziesaccount@...il.com>,
        "jic23@...nel.org" <jic23@...nel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        Waiman Long <longman@...hat.com>, mingo@...hat.com,
        will@...nel.org, boqun.feng@...il.com,
        "linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "kernel@...utedevices.com" <kernel@...utedevices.com>
Subject: Re: [PATCH v2 01/10] devm-helpers: introduce devm_mutex_init

On Thu, Dec 7, 2023 at 1:23 AM George Stark <gnstark@...utedevices.com> wrote:
> On 12/7/23 01:37, Christophe Leroy wrote:
> > Le 06/12/2023 à 23:14, Christophe Leroy a écrit :

...

> > Looking at it closer, I have the feeling that you want to do similar to
> > devm_gpio_request() in linux/gpio.h :
> >
> > In linux/mutex.h, add a prototype for devm_mutex_init() when
> > CONFIG_DEBUG_MUTEXES is defined and an empty static inline otherwise.
> > Then define devm_mutex_init() in kernel/locking/mutex-debug.c
>
> Yes, this would be almost perfect decision. BTW just as in linux/gpio.h
> we wouldn't have to include whole "linux/device.h" into mutex.h, only
> add forward declaration of struct device;

In case you place it into a C-file. Otherwise you need a header for
the API and that is not acceptable for mutex.h.

-- 
With Best Regards,
Andy Shevchenko