linux-kernel - Re: [PATCH 3/4] Input: st1232 - add virtual touchscreen and buttons handling

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Message-ID: <d35b5a67-eeb3-1f0f-c892-4bafcccbf317@wolfvision.net>
Date:   Mon, 15 May 2023 06:34:45 +0200
From:   Javier Carrasco <javier.carrasco@...fvision.net>
To:     kernel test robot <lkp@...el.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Henrik Rydberg <rydberg@...math.org>,
        Bastian Hecht <hechtb@...il.com>,
        Michael Riesch <michael.riesch@...fvision.net>
Cc:     linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        oe-kbuild-all@...ts.linux.dev
Subject: Re: [PATCH 3/4] Input: st1232 - add virtual touchscreen and buttons
 handling

On 14.05.23 00:38, kernel test robot wrote:
> Hi Javier,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on ac9a78681b921877518763ba0e89202254349d1b]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Javier-Carrasco/Input-ts-virtobj-Add-touchsreen-virtual-object-handling/20230510-215519
> base:   ac9a78681b921877518763ba0e89202254349d1b
> patch link:    https://lore.kernel.org/r/20230510-feature-ts_virtobj_patch-v1-3-5ae5e81bc264%40wolfvision.net
> patch subject: [PATCH 3/4] Input: st1232 - add virtual touchscreen and buttons handling
> config: arm-randconfig-m041-20230514 (https://download.01.org/0day-ci/archive/20230514/202305140640.VLcvhR5G-lkp@intel.com/config)
> compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://github.com/intel-lab-lkp/linux/commit/133c0f8c33dc5e70a72e6a7d670e133b6043a7a3
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Javier-Carrasco/Input-ts-virtobj-Add-touchsreen-virtual-object-handling/20230510-215519
>         git checkout 133c0f8c33dc5e70a72e6a7d670e133b6043a7a3
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@...el.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202305140640.VLcvhR5G-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>    arm-linux-gnueabi-ld: drivers/input/touchscreen/st1232.o: in function `st1232_ts_parse_and_report':
>>> st1232.c:(.text+0x148): undefined reference to `ts_virtobj_is_button_slot'
>>> arm-linux-gnueabi-ld: st1232.c:(.text+0x15e): undefined reference to `ts_virtobj_button_press'
>>> arm-linux-gnueabi-ld: st1232.c:(.text+0x16c): undefined reference to `ts_virtobj_mt_on_touchscreen'
>>> arm-linux-gnueabi-ld: st1232.c:(.text+0x242): undefined reference to `ts_virtobj_mapped_buttons'
>>> arm-linux-gnueabi-ld: st1232.c:(.text+0x266): undefined reference to `ts_virtobj_is_button_slot'
>>> arm-linux-gnueabi-ld: st1232.c:(.text+0x276): undefined reference to `ts_virtobj_button_release'
>    arm-linux-gnueabi-ld: drivers/input/touchscreen/st1232.o: in function `st1232_ts_probe':
>>> st1232.c:(.text+0x42c): undefined reference to `ts_virtobj_map_objects'
>>> arm-linux-gnueabi-ld: st1232.c:(.text+0x43c): undefined reference to `ts_virtobj_mapped_touchscreen'
>>> arm-linux-gnueabi-ld: st1232.c:(.text+0x44a): undefined reference to `ts_virtobj_get_touchscreen_abs'
>    arm-linux-gnueabi-ld: st1232.c:(.text+0x520): undefined reference to `ts_virtobj_mapped_buttons'
>>> arm-linux-gnueabi-ld: st1232.c:(.text+0x542): undefined reference to `ts_virtobj_set_button_caps'
> 
Apparently there is something wrong about the references from this patch
to a previous one from the same series ([PATCH 1/4] Input: ts-virtobj -
Add touchs[c]reen virtual object handling). The "url" link shows all
patches of this series in the right order though.

All these functions are declared in the linux/input/ts-virtobj.h header
and also inline-defined there if ts-virtobj is not selected. If it is
selected (either y or M), the functions are exported from
driver/input/touchscreen/ts-virtobj.c. According to the error report,
ts-virtobj was selected as a module.

I could build the kernel with the three possible configurations
(ts-virtobj y/n/M) for x86_64 as well as for arm64 with no errors or
warnings repeatedly, so I am a bit confused now. I am probably
missing something, but I do not know what.

I wonder if the new file where the functions are defined (ts-virtobj.c)
could not be found by some reason or if the test build does not like the
way I handled the function declaration/definition. Any hint or advice
would be more than welcome.