netdev - Re: [PATCH 1/1] mISDN: Mark local variable 'incomplete' as __maybe_unused in dsp_pipeline

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Date:   Wed, 19 May 2021 18:45:46 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Zhen Lei <thunder.leizhen@...wei.com>
Cc:     Karsten Keil <isdn@...ux-pingi.de>, netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH 1/1] mISDN: Mark local variable 'incomplete' as
 __maybe_unused in dsp_pipeline_build()

On Wed, May 19, 2021 at 08:53:52PM +0800, Zhen Lei wrote:
> GCC reports the following warning with W=1:
> 
> drivers/isdn/mISDN/dsp_pipeline.c:221:6: warning:
>  variable 'incomplete' set but not used [-Wunused-but-set-variable]
>   221 |  int incomplete = 0, found = 0;
>       |      ^~~~~~~~~~
> 
> This variable is used only when macro PIPELINE_DEBUG is defined.

That define is commented 13 years ago and can be seen as a dead code
that should be removed.

Thanks

> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
> ---
>  drivers/isdn/mISDN/dsp_pipeline.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/isdn/mISDN/dsp_pipeline.c b/drivers/isdn/mISDN/dsp_pipeline.c
> index 40588692cec7..6a31f6879da8 100644
> --- a/drivers/isdn/mISDN/dsp_pipeline.c
> +++ b/drivers/isdn/mISDN/dsp_pipeline.c
> @@ -218,7 +218,7 @@ void dsp_pipeline_destroy(struct dsp_pipeline *pipeline)
>  
>  int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg)
>  {
> -	int incomplete = 0, found = 0;
> +	int __maybe_unused incomplete = 0, found = 0;
>  	char *dup, *tok, *name, *args;
>  	struct dsp_element_entry *entry, *n;
>  	struct dsp_pipeline_entry *pipeline_entry;
> -- 
> 2.25.1
> 
>