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Date:   Fri, 01 May 2020 16:42:02 -0700
From:   Joe Perches <joe@...ches.com>
To:     Jacob Keller <jacob.e.keller@...el.com>,
        linux-kernel@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Andy Whitcroft <apw@...onical.com>
Subject: Re: [PATCH] checkpatch: add NL_SET_ERR_MSG to 80 column exceptions

On Fri, 2020-05-01 at 16:11 -0700, Jacob Keller wrote:
> NL_SET_ERR_MSG and NL_SET_ERR_MSG_MOD are used to report extended error
> responses about failure of a netlink command. These strings often end up
> going over the 80-column limit. Just like logging messages, it is
> preferred to leave the message all on a single line.
> 
> Add these to the exception list so that checkpatch.pl will no longer
> complain about the long lines due to use of these macros.
> 
> Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Andy Whitcroft <apw@...onical.com>
> Cc: Joe Perches <joe@...ches.com>
> ---
>  scripts/checkpatch.pl | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index eac40f0abd56..5da3b06fbeaa 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -471,7 +471,8 @@ our $logFunctions = qr{(?x:
>  	WARN(?:_RATELIMIT|_ONCE|)|
>  	panic|
>  	MODULE_[A-Z_]+|
> -	seq_vprintf|seq_printf|seq_puts
> +	seq_vprintf|seq_printf|seq_puts|
> +	NL_SET_ERR_MSG(?:_MOD)?
>  )};
>  
>  our $allocFunctions = qr{(?x:

<shrug>  OK I guess.

What about GENL_SET_ERR_MSG ?

btw:

There are some uses with what appear to be unnecessary newlines.
Maybe these newlines should be removed.

drivers/net/ethernet/mscc/ocelot_tc.c:50:			NL_SET_ERR_MSG_MOD(extack,
					   "Only one policer per port is supported\n");
drivers/net/ethernet/mscc/ocelot_tc.c:61:			NL_SET_ERR_MSG_MOD(extack, "Could not add policer\n");
drivers/net/ethernet/mscc/ocelot_tc.c:74:			NL_SET_ERR_MSG_MOD(extack,
					   "Could not delete policer\n");
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c:1099:			NL_SET_ERR_MSG_MOD(extack,
					   "Failed to create tc offload table\n");
net/dsa/slave.c:915:		NL_SET_ERR_MSG_MOD(extack,
				   "Policing offload not implemented\n");
net/dsa/slave.c:920:		NL_SET_ERR_MSG_MOD(extack,
				   "Only supported on ingress qdisc\n");
net/dsa/slave.c:930:			NL_SET_ERR_MSG_MOD(extack,
					   "Only one port policer allowed\n");
net/bridge/br_stp_if.c:205:		NL_SET_ERR_MSG_MOD(extack,
				   "STP can't be enabled if MRP is already enabled\n");
net/bridge/br_mrp_netlink.c:31:		NL_SET_ERR_MSG_MOD(extack, "MRP can't be enabled if STP is already enabled\n");


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