[PATCH v2 0/1] mcb: Add modpost support for processing MODULE_DEVICE_TABLE

From: Jose Javier Rodriguez Barbarin
Date: Mon Dec 01 2025 - 11:10:22 EST


During the process of update of one of the device drivers that are part of
mcb bus (gpio-menz127.c), Krzysztof from 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@xxxxxxxxxx/

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.

Once this patch is merged, I will send patches one by one for removing
MODULE_ALIAS from all device drivers as they are no longer needed
(as Andy Shevchenko suggested in v1 review).

---
Changes in v2:

- Place "mcb" before "mei" to follow the order.
- Send changes for mcb drivers in a per-driver basis.

Jose Javier Rodriguez Barbarin (1):
mcb: Add missing modpost build support

scripts/mod/devicetable-offsets.c | 3 +++
scripts/mod/file2alias.c | 9 +++++++++
2 files changed, 12 insertions(+)

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2.51.1