Message-ID: <89ff97ff-310d-579a-63d4-84cf093482d5@infradead.org>
Date:   Tue, 28 Feb 2023 23:11:57 -0800
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Subject: Re: ERROR: modpost: "iounmap" [drivers/tty/ipwireless/ipwireless.ko]
 undefined!
Content-Language: en-US
To:     Yonghong Song <yhs@meta.com>, kernel test robot <lkp@intel.com>,
        Yonghong Song <yhs@fb.com>
Cc:     oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org,
        Alexei Starovoitov <ast@kernel.org>
References: <202303010701.KWYce0Mt-lkp@intel.com>
 <1f63f410-6bfc-7b59-7a7d-8fca323ada53@meta.com>
From:   Randy Dunlap <rdunlap@infradead.org>
In-Reply-To: <1f63f410-6bfc-7b59-7a7d-8fca323ada53@meta.com>
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On 2/28/23 23:05, Yonghong Song wrote:
> 
> 
> 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.
> 

CONFIG_HAS_IOMEM is not set. Happens often on ARCH=s390 when CONFIG_PCI is not set.

>>
>> If you fix the issue, kindly add following tag where applicable
>> | Reported-by: kernel test robot <lkp@intel.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!
>>

-- 
~Randy