Re: [PATCH v4] locking/mutex: Mark devm_mutex_init() as __must_check

[Andy Shevchenko]

On Mon, Apr 07, 2025 at 09:46:47AM +0200, Thomas Weißschuh wrote:
> Even if it's not critical, the avoidance of checking the error code
> from devm_mutex_init() call today diminishes the point of using the devm
> variant of it. Tomorrow it may even leak something. Enforce all callers
> checking the return value through the compiler.
> 
> As devm_mutex_init() itself is a macro, it can not be annotated
> directly. Annotate __devm_mutex_init() instead.
> Unfortunately __must_check/warn_unused_result don't propagate through
> statement expression. So move the statement expression into the argument
> list of the call to __devm_mutex_init() through a helper macro.

FWIW,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>

-- 
With Best Regards,
Andy Shevchenko