linux-kernel - Re: [PATCH 0/2] mcb: Add modpost support for processing MODULE_DEVICE

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Message-ID: <CAHp75VdvJUFwFBRKT+iqwQXiK-toah3gZq6pX9Omcp6d2R7g+A@mail.gmail.com>
Date: Thu, 27 Nov 2025 18:16:03 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Jose Javier Rodriguez Barbarin <dev-josejavier.rodriguez@...gon.com>
Cc: linus.walleij@...aro.org, brgl@...nel.org, jic23@...nel.org, 
	dlechner@...libre.com, nuno.sa@...log.com, andy@...nel.org, 
	gregkh@...uxfoundation.org, jirislaby@...nel.org, morbidrsa@...il.com, 
	jth@...nel.org, wim@...ux-watchdog.org, linux@...ck-us.net, nathan@...nel.org, 
	nsc@...nel.org, linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-iio@...r.kernel.org, linux-serial@...r.kernel.org, 
	linux-watchdog@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH 0/2] mcb: Add modpost support for processing MODULE_DEVICE_TABLE

On Thu, Nov 27, 2025 at 5:56 PM Jose Javier Rodriguez Barbarin
<dev-josejavier.rodriguez@...gon.com> wrote:
>
> During the process of update of one of the device drivers that are part of
> mcb bus (gpio-menz127.c),

> one maintainer of the GPIO subsystem

Krzysztof? Did I miss something and he is now a (co)maintainer here?

> asked me
> why I was adding new MODULE_ALIAS when I also added the same new
> information on MODULE_DEVICE_TABLE.
>
> You can find the messages here:
>
> https://lore.kernel.org/linux-gpio/80a20b13-7c6a-4483-9741-568424f957ef@kernel.org/
>
> After a deeper analysis, I came across that the mcb_table_id defined inside
> MODULE_DEVICE_TABLE on all device drivers was being ignored as modpost was
> not processing the mcb MODULE_DEVICE_TABLE entries. For this reason, former
> contributors were using MODULE_ALIAS for enabling mcb to autoload the
> device drivers.
>
> My proposal with these changes is to complete the mcb bus by adding
> modpost support for processing mcb MODULE_DEVICE_TABLE and removing
> MODULE_ALIAS from all device drivers as they are no longer needed.
>
> Jose Javier Rodriguez Barbarin (2):
>   mcb: Add missing modpost build support
>   mcb: Remove MODULE_ALIAS from all mcb client drivers
>
>  drivers/gpio/gpio-menz127.c            | 1 -
>  drivers/iio/adc/men_z188_adc.c         | 1 -
>  drivers/tty/serial/8250/8250_men_mcb.c | 3 ---
>  drivers/tty/serial/men_z135_uart.c     | 1 -
>  drivers/watchdog/menz69_wdt.c          | 1 -
>  scripts/mod/devicetable-offsets.c      | 3 +++
>  scripts/mod/file2alias.c               | 9 +++++++++
>  7 files changed, 12 insertions(+), 7 deletions(-)
>
> --
> 2.51.1



-- 
With Best Regards,
Andy Shevchenko