linux-kernel - Re: [PATCH] HID: Kconfig: Fix build error from CONFIG_HID

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Message-ID: <r8116qrr-5n80-01s8-92o0-88n8q14007s9@xreary.bet>
Date: Tue, 14 Oct 2025 12:09:20 +0200 (CEST)
From: Jiri Kosina <jikos@...nel.org>
To: Jonathan Denose <jdenose@...gle.com>
cc: Benjamin Tissoires <bentiss@...nel.org>, 
    Thorsten Leemhuis <linux@...mhuis.info>, 
    Randy Dunlap <rdunlap@...radead.org>, 
    Lucas GISSOT <lucas.gissot.pro@...il.com>, linux-input@...r.kernel.org, 
    linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: Kconfig: Fix build error from CONFIG_HID_HAPTIC

On Mon, 13 Oct 2025, Jonathan Denose wrote:

> Temporarily change CONFIG_HID_HAPTIC to be bool instead of tristate, until
> we implement a permanent solution.
> 
> ---
> Recently the CONFIG_HID_HAPTIC Kconfig option was reported as causing
> the following build errors:
> 
>   MODPOST Module.symvers
> ERROR: modpost: "hid_haptic_init" [drivers/hid/hid-multitouch.ko] undefined!
> ERROR: modpost: "hid_haptic_pressure_increase" [drivers/hid/hid-multitouch.ko] undefined!
> ERROR: modpost: "hid_haptic_check_pressure_unit" [drivers/hid/hid-multitouch.ko] undefined!
> ERROR: modpost: "hid_haptic_input_configured" [drivers/hid/hid-multitouch.ko] undefined!
> ERROR: modpost: "hid_haptic_input_mapping" [drivers/hid/hid-multitouch.ko] undefined!
> ERROR: modpost: "hid_haptic_feature_mapping" [drivers/hid/hid-multitouch.ko] undefined!
> ERROR: modpost: "hid_haptic_pressure_reset" [drivers/hid/hid-multitouch.ko] undefined!
> make[3]: *** [/home/thl/var/linux.dev/scripts/Makefile.modpost:147: Module.symvers] Error 1
> 
> when the kernel is compiled with the following configuration:
> 
> CONFIG_HID=y
> CONFIG_HID_MULTITOUCH=m
> CONFIG_HID_HAPTIC=m
> 
> To resolve this, temporarily change the CONFIG_HID_HAPTIC option to be
> bool, until we arrive at a permanent solution to enable CONFIG_HID_HAPTIC
> to be tristate.
> 
> For a more detailed discussion, see [1].
> 
> [1]: https://lore.kernel.org/linux-input/auypydfkhx2eg7vp764way4batdilzc35inqda3exwzs3tk3ff@oagat6g46zto/
> 
> Signed-off-by: Jonathan Denose <jdenose@...gle.com>

I've moved this whole block above the --- line and applied.

Thanks,

-- 
Jiri Kosina
SUSE Labs