linux-kernel - Re: [PATCH v2 1/3] base: mark 'no

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Date:   Mon, 26 Jul 2021 13:47:33 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Bill Wendling <morbo@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        clang-built-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] base: mark 'no_warn' as unused

+ Greg and Rafael as the maintainer and reviewer of 
drivers/base/module.c respectively, drop everyone else.

Original post:

https://lore.kernel.org/r/20210726201924.3202278-2-morbo@google.com/

On 7/26/2021 1:19 PM, 'Bill Wendling' via Clang Built Linux wrote:
> Fix the following build warning:
> 
>    drivers/base/module.c:36:6: error: variable 'no_warn' set but not used [-Werror,-Wunused-but-set-variable]
>          int no_warn;
> 
> This variable is used to remove another warning, but causes a warning
> itself. Mark it as 'unused' to avoid that.
> 
> Signed-off-by: Bill Wendling <morbo@...gle.com>

Even though they evaluate to the same thing, it might be worth using 
"__always_unused" here because it is :)

Regardless:

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

> ---
>   drivers/base/module.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/base/module.c b/drivers/base/module.c
> index 46ad4d636731..10494336d601 100644
> --- a/drivers/base/module.c
> +++ b/drivers/base/module.c
> @@ -33,7 +33,7 @@ static void module_create_drivers_dir(struct module_kobject *mk)
>   void module_add_driver(struct module *mod, struct device_driver *drv)
>   {
>   	char *driver_name;
> -	int no_warn;
> +	int __maybe_unused no_warn;
>   	struct module_kobject *mk = NULL;
>   
>   	if (!drv)
>