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

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Message-ID: <20251127155452.42660-1-dev-josejavier.rodriguez@duagon.com>
Date: Thu, 27 Nov 2025 16:54:50 +0100
From: Jose Javier Rodriguez Barbarin <dev-josejavier.rodriguez@...gon.com>
To: linus.walleij@...aro.org,
	brgl@...nel.org,
	jic23@...nel.org,
	dlechner@...libre.com,
	nuno.sa@...log.com,
	andy@...nel.org,
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	jth@...nel.org,
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	nathan@...nel.org,
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CC: 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,
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	Jose Javier Rodriguez Barbarin <dev-josejavier.rodriguez@...gon.com>
Subject: [PATCH 0/2] mcb: Add modpost support for processing MODULE_DEVICE_TABLE

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 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