linux-kernel - Re: [PATCH -next] ALSA: line6: Fix -Wunused-const-variable warnings

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Date:   Thu, 22 Aug 2019 17:22:04 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     <pavel@...x.de>, <tglx@...utronix.de>,
        <gregkh@...uxfoundation.org>, <allison@...utok.net>,
        <perex@...ex.cz>, <pakki001@....edu>,
        <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] ALSA: line6: Fix -Wunused-const-variable warnings

On Thu, 22 Aug 2019 16:57:41 +0200,
YueHaibing wrote:
> 
> sound/usb/line6/driver.h:69:18: warning:
>  SYSEX_DATA_OFS defined but not used [-Wunused-const-variable=]
> sound/usb/line6/driver.h:70:18: warning:
>  SYSEX_EXTRA_SIZE defined but not used [-Wunused-const-variable=]
> 
> SYSEX_EXTRA_SIZE is only used in driver.c and
> SYSEX_DATA_OFS in pod.c, so move them to .c fix
> this warning.
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>

No, this makes things worse.  It should have been simply a normal
define instead.

Care to resend the fix with replacement to define?


thanks,

Takashi

> ---
>  sound/usb/line6/driver.c | 2 ++
>  sound/usb/line6/driver.h | 3 ---
>  sound/usb/line6/pod.c    | 2 ++
>  3 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c
> index b5a3f75..8027da8 100644
> --- a/sound/usb/line6/driver.c
> +++ b/sound/usb/line6/driver.c
> @@ -31,6 +31,8 @@ const unsigned char line6_midi_id[3] = {
>  };
>  EXPORT_SYMBOL_GPL(line6_midi_id);
>  
> +static const int SYSEX_EXTRA_SIZE = sizeof(line6_midi_id) + 4;
> +
>  /*
>  	Code to request version of POD, Variax interface
>  	(and maybe other devices).
> diff --git a/sound/usb/line6/driver.h b/sound/usb/line6/driver.h
> index e5e572e..c57633a 100644
> --- a/sound/usb/line6/driver.h
> +++ b/sound/usb/line6/driver.h
> @@ -66,9 +66,6 @@
>  
>  extern const unsigned char line6_midi_id[3];
>  
> -static const int SYSEX_DATA_OFS = sizeof(line6_midi_id) + 3;
> -static const int SYSEX_EXTRA_SIZE = sizeof(line6_midi_id) + 4;
> -
>  /*
>  	 Common properties of Line 6 devices.
>  */
> diff --git a/sound/usb/line6/pod.c b/sound/usb/line6/pod.c
> index ee4c9d2..24ad337 100644
> --- a/sound/usb/line6/pod.c
> +++ b/sound/usb/line6/pod.c
> @@ -110,6 +110,8 @@ enum {
>  	POD_BUSY_MIDISEND
>  };
>  
> +static const int SYSEX_DATA_OFS = sizeof(line6_midi_id) + 3;
> +
>  static struct snd_ratden pod_ratden = {
>  	.num_min = 78125,
>  	.num_max = 78125,
> -- 
> 2.7.4
> 
> 
>