linux-kernel - Re: ERROR: modpost: "iounmap" [drivers/tty/ipwireless/ipwireless.ko] undefined!

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Date:   Tue, 28 Feb 2023 23:05:41 -0800
From:   Yonghong Song <yhs@...a.com>
To:     kernel test robot <lkp@...el.com>, Yonghong Song <yhs@...com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>
Subject: Re: ERROR: modpost: "iounmap" [drivers/tty/ipwireless/ipwireless.ko]
 undefined!



On 2/28/23 3:22 PM, kernel test robot wrote:
> Hi Yonghong,
> 
> First bad commit (maybe != root cause):
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   e492250d5252635b6c97d52eddf2792ec26f1ec1
> commit: dffbbdc2d9889670c30e07d05fc0dd712e8ad430 libbpf: Add enum64 parsing and new enum64 public API
> date:   9 months ago
> config: s390-randconfig-r021-20230227 (https://download.01.org/0day-ci/archive/20230301/202303010701.KWYce0Mt-lkp@intel.com/config )
> compiler: s390-linux-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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dffbbdc2d9889670c30e07d05fc0dd712e8ad430
>          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>          git fetch --no-tags linus master
>          git checkout dffbbdc2d9889670c30e07d05fc0dd712e8ad430
>          # save the config file
>          mkdir build_dir && cp config build_dir/.config
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 olddefconfig
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash

I don't think the commit 'libbpf: Add enum64 parsing and new enum64 
public API' is responsible for the test failure. That commit is purely 
userspace and should not be the reason for kernel module symbol undefined.

> 
> 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/202303010701.KWYce0Mt-lkp@intel.com/
> 
> All errors (new ones prefixed by >>, old ones prefixed by <<):
> 
>>> ERROR: modpost: "iounmap" [drivers/tty/ipwireless/ipwireless.ko] undefined!
>>> ERROR: modpost: "ioremap" [drivers/tty/ipwireless/ipwireless.ko] undefined!
> ERROR: modpost: "ioremap" [drivers/net/arcnet/com90xx.ko] undefined!
> ERROR: modpost: "iounmap" [drivers/net/arcnet/com90xx.ko] undefined!
>>> ERROR: modpost: "iounmap" [drivers/pcmcia/pcmcia.ko] undefined!
>>> ERROR: modpost: "ioremap" [drivers/pcmcia/pcmcia.ko] undefined!
>