Subject: Re: [PATCH 08/30] net: wireless: ath: carl9170: Mark 'ar9170_qmap' as __maybe_unused

From: Christian Lamparter <[email-masked]>
Date: Fri, 14 Aug 2020 17:14:31 +0200

On 2020-08-14 13:39, Lee Jones wrote:
> 'ar9170_qmap' is used in some source files which include carl9170.h,
> but not all of them.  Mark it as __maybe_unused to show that this is
> not only okay, it's expected.
> 
> Fixes the following W=1 kernel build warning(s)

Is this W=1 really a "must" requirement? I find it strange having
__maybe_unused in header files as this "suggests" that the
definition is redundant.

>   from drivers/net/wireless/ath/carl9170/carl9170.h:57,
>   In file included from drivers/net/wireless/ath/carl9170/carl9170.h:57,
>   drivers/net/wireless/ath/carl9170/carl9170.h:71:17: warning: ‘ar9170_qmap’ defined but not used [-Wunused-const-variable=]
> 

> 
> Cc: Christian Lamparter <[email-masked]>
> Cc: Kalle Valo <[email-masked]>
> Cc: "David S. Miller" <[email-masked]>
> Cc: Jakub Kicinski <[email-masked]>
> Cc: Johannes Berg <[email-masked]>
> Cc: [email-masked]
> Cc: [email-masked]
> Signed-off-by: Lee Jones <[email-masked]>
> ---
>   drivers/net/wireless/ath/carl9170/carl9170.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/ath/carl9170/carl9170.h b/drivers/net/wireless/ath/carl9170/carl9170.h
> index 237d0cda1bcb0..9d86253081bce 100644
> --- a/drivers/net/wireless/ath/carl9170/carl9170.h
> +++ b/drivers/net/wireless/ath/carl9170/carl9170.h
> @@ -68,7 +68,7 @@
>   
>   #define PAYLOAD_MAX	(CARL9170_MAX_CMD_LEN / 4 - 1)
>   
> -static const u8 ar9170_qmap[__AR9170_NUM_TXQ] = { 3, 2, 1, 0 };
> +static const u8 __maybe_unused ar9170_qmap[__AR9170_NUM_TXQ] = { 3, 2, 1, 0 };
>   
>   #define CARL9170_MAX_RX_BUFFER_SIZE		8192
>   
>