netdev - RE: [PATCH net-next 2/2] net: rose: Escape trigraph to fix warning with W=1

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Date:   Thu, 29 Oct 2020 14:19:27 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Andrew Lunn' <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>
CC:     netdev <netdev@...r.kernel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Ralf Baechle <ralf@...ux-mips.org>
Subject: RE: [PATCH net-next 2/2] net: rose: Escape trigraph to fix warning
 with W=1

From: Andrew Lunn
> Sent: 28 October 2020 00:23
> 
> net/rose/af_rose.c: In function ‘rose_info_show’:
> net/rose/af_rose.c:1413:20: warning: trigraph ??- ignored, use -trigraphs to enable [-Wtrigraphs]
>  1413 |    callsign = "??????-?";
> 
> ??- is a trigraph, and should be replaced by a ˜ by the
> compiler. However, trigraphs are being ignored in the build. Fix the
> warning by escaping the ?? prefix of a trigraph.
> 
> Signed-off-by: Andrew Lunn <andrew@...n.ch>
> ---
>  net/rose/af_rose.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
> index cf7d974e0f61..2c297834d268 100644
> --- a/net/rose/af_rose.c
> +++ b/net/rose/af_rose.c
> @@ -1410,7 +1410,7 @@ static int rose_info_show(struct seq_file *seq, void *v)
>  			   ax2asc(buf, &rose->dest_call));
> 
>  		if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
> -			callsign = "??????-?";
> +			callsign = "????\?\?-?";

I think I'd just split the string, eg: "?????" "-?".

	David

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