[PATCH v2 01/10] devm-helpers: introduce devm_mutex_init
Andy Shevchenko
andy.shevchenko at gmail.com
Tue Dec 5 05:11:55 AEDT 2023
On Mon, Dec 4, 2023 at 8:07 PM George Stark <gnstark at salutedevices.com> wrote:
>
> Using of devm API leads to certain order of releasing resources.
> So all dependent resources which are not devm-wrapped should be deleted
> with respect to devm-release order. Mutex is one of such objects that
> often is bound to other resources and has no own devm wrapping.
> Since mutex_destroy() actually does nothing in non-debug builds
> frequently calling mutex_destroy() is just ignored which is safe for now
> but wrong formally and can lead to a problem if mutex_destroy() is
> extended so introduce devm_mutex_init().
...
Do you need to include mutex.h?
...
> +/**
> + * devm_mutex_init - Resource-managed mutex initialization
> + * @dev: Device which lifetime work is bound to
> + * @lock: Pointer to a mutex
> + *
> + * Initialize mutex which is automatically destroyed when driver is detached.
the driver
Have you run scripts/kernel-doc -v -Wall -none ... against this file?
I'm pretty sure it will complain.
> + */
--
With Best Regards,
Andy Shevchenko
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