linux-kernel - Re: [hnaz-mm:master 34/291] WARNING: modpost: vmlinux.o(.data+0x234bc8): Section mismatch in reference from the variable fc2580_driver to the function .init.text:set_reset

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Date:   Thu, 28 Apr 2022 19:42:10 +0800
From:   "Chen, Rong A" <rong.a.chen@...el.com>
To:     David Hildenbrand <david@...hat.com>,
        kernel test robot <lkp@...el.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: [hnaz-mm:master 34/291] WARNING: modpost:
 vmlinux.o(.data+0x234bc8): Section mismatch in reference from the variable
 fc2580_driver to the function .init.text:set_reset_devices()



On 4/25/2022 4:04 PM, David Hildenbrand wrote:
> On 24.04.22 06:21, kernel test robot wrote:
>> tree:   https://github.com/hnaz/linux-mm master
>> head:   ba42854fa9997614e0ffdbc35b082df3ba6e59da
>> commit: 477a4d0f1f38e738d1a50d5005b79aca719c30bc [34/291] mm/hugetlb: take src_mm->write_protect_seq in copy_hugetlb_page_range()
>> config: riscv-randconfig-r015-20220420 (https://download.01.org/0day-ci/archive/20220424/202204241241.dnUrBBvT-lkp@intel.com/config)
>> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project bac6cd5bf85669e3376610cfc4c4f9ca015e7b9b)
>> 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
>>          # install riscv cross compiling tool for clang build
>>          # apt-get install binutils-riscv64-linux-gnu
>>          # https://github.com/hnaz/linux-mm/commit/477a4d0f1f38e738d1a50d5005b79aca719c30bc
>>          git remote add hnaz-mm https://github.com/hnaz/linux-mm
>>          git fetch --no-tags hnaz-mm master
>>          git checkout 477a4d0f1f38e738d1a50d5005b79aca719c30bc
>>          # save the config file
>>          mkdir build_dir && cp config build_dir/.config
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All warnings (new ones prefixed by >>, old ones prefixed by <<):
>>
>>>> WARNING: modpost: vmlinux.o(.data+0x234bc8): Section mismatch in reference from the variable fc2580_driver to the function .init.text:set_reset_devices()
>> The variable fc2580_driver references
>> the function __init set_reset_devices()
>> If the reference is valid then annotate the
>> variable with or __refdata (see linux/init.h) or name the variable:
> 
> I don't see my patch causing that. Seems unrelated.
> 


Hi David,

Please ignore this report, similar warnings can be found on parent 
commit too:

Note: the below error/warnings can be found in parent commit:
<< WARNING: modpost: vmlinux.o(.text+0x13e3592): Section mismatch in 
reference from the function usbhid_find_interface() to the variable 
.init.text:.LBB0_1
<< WARNING: modpost: vmlinux.o(.text+0x13e3596): Section mismatch in 
reference from the function usbhid_find_interface() to the function 
.init.text:set_reset_devices()

Best Regards,
Rong Chen