linux-kernel - Re: decompress.c:undefined reference to `_

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Date:   Mon, 30 Aug 2021 07:46:13 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Randy Dunlap <rdunlap@...radead.org>,
        kernel test robot <lkp@...el.com>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: Re: decompress.c:undefined reference to `__decompress'



Le 30/08/2021 à 04:30, Randy Dunlap a écrit :
> On 5/21/21 1:20 AM, kernel test robot wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head:   79a106fc6585979022012e65a1e45e3d2d28b77b
>> commit: 665d8d58761cba41147fe7e98e2ceed1cbf603a2 powerpc/akebono: Fix unmet dependency errors
>> date:   3 months ago
>> config: powerpc64-randconfig-r023-20210521 (attached as .config)
>> compiler: powerpc-linux-gcc (GCC) 9.3.0
>> 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=665d8d58761cba41147fe7e98e2ceed1cbf603a2 
>>
>>          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>>          git fetch --no-tags linus master
>>          git checkout 665d8d58761cba41147fe7e98e2ceed1cbf603a2
>>          # save the attached .config to linux build tree
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All errors (new ones prefixed by >>):
>>
>>     powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>>>> decompress.c:(.text+0x1f0): undefined reference to `__decompress'
>>
>> ---
> 
> Hi Christophe,
> 
> Didn't you have a patch that adds boot support in Powerpc for
> LZMA and LZO?  What happened to that patch?
> 

Yes it is still there

https://patchwork.ozlabs.org/project/linuxppc-dev/patch/a74fce4dfc9fa32da6ce3470bbedcecf795de1ec.1591189069.git.christophe.leroy@csgroup.eu/

But as far as I remember it didn't pass CI build tests. Need to have a new look at it.