linux-kernel - Re: [PATCH v9 07/27] net: wan: Add support for QMC HDLC

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Date: Thu, 14 Mar 2024 15:31:15 +0000
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Guenter Roeck <linux@...ck-us.net>, Herve Codina
	<herve.codina@...tlin.com>
CC: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>, Rob Herring
	<robh+dt@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, Lee
 Jones <lee@...nel.org>, Linus Walleij <linus.walleij@...aro.org>, Qiang Zhao
	<qiang.zhao@....com>, Li Yang <leoyang.li@....com>, Liam Girdwood
	<lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, Jaroslav Kysela
	<perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, Shengjiu Wang
	<shengjiu.wang@...il.com>, Xiubo Li <Xiubo.Lee@...il.com>, Fabio Estevam
	<festevam@...il.com>, Nicolin Chen <nicoleotsuka@...il.com>, Randy Dunlap
	<rdunlap@...radead.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "alsa-devel@...a-project.org"
	<alsa-devel@...a-project.org>, Simon Horman <horms@...nel.org>, Christophe
 JAILLET <christophe.jaillet@...adoo.fr>, Thomas Petazzoni
	<thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v9 07/27] net: wan: Add support for QMC HDLC



Le 14/03/2024 à 16:21, Guenter Roeck a écrit :
> On Wed, Nov 15, 2023 at 03:39:43PM +0100, Herve Codina wrote:
>> The QMC HDLC driver provides support for HDLC using the QMC (QUICC
>> Multichannel Controller) to transfer the HDLC data.
>>
>> Signed-off-by: Herve Codina <herve.codina@...tlin.com>
>> Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>
>> Acked-by: Jakub Kicinski <kuba@...nel.org>
>> ---
> [ ... ]
> 
>> +
>> +static const struct of_device_id qmc_hdlc_id_table[] = {
>> +	{ .compatible = "fsl,qmc-hdlc" },
>> +	{} /* sentinel */
>> +};
>> +MODULE_DEVICE_TABLE(of, qmc_hdlc_driver);
> 
> I am a bit puzzled. How does this even compile ?

Because

#else  /* !MODULE */
#define MODULE_DEVICE_TABLE(type, name)
#endif


We should probably try to catch those errors when CONFIG_MODULE is not set.

By the way, a fix is available at 
https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20240314123346.461350-1-herve.codina@bootlin.com/

Christophe