linux-kernel - Re: [kbuild-all] Re: include/linux/build_bug.h:78:41: error: static assertion failed: "offsetof(struct page, compound

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Date:   Mon, 14 Feb 2022 14:28:42 +0800
From:   "Chen, Rong A" <rong.a.chen@...el.com>
To:     Matthew Wilcox <willy@...radead.org>,
        kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        William Kucharski <william.kucharski@...cle.com>,
        Christoph Hellwig <hch@....de>,
        David Howells <dhowells@...hat.com>
Subject: Re: [kbuild-all] Re: include/linux/build_bug.h:78:41: error: static
 assertion failed: "offsetof(struct page, compound_head) == offsetof(struct
 folio, lru)"



On 2/13/2022 8:19 PM, Matthew Wilcox wrote:
> On Sun, Feb 13, 2022 at 07:00:16PM +0800, kernel test robot wrote:
>> config: parisc-randconfig-r004-20220213 (https://download.01.org/0day-ci/archive/20220213/202202131828.VxAopBqR-lkp@intel.com/config)
>> compiler: hppa64-linux-gcc (GCC) 11.2.0
>> 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=7b230db3b8d373219f88a3d25c8fbbf12cc7f233
>>          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>>          git fetch --no-tags linus master
>>          git checkout 7b230db3b8d373219f88a3d25c8fbbf12cc7f233
>>          # save the config file to linux build tree
>>          mkdir build_dir
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=parisc prepare
> 
> There's something weird going on here.

Hi Matthew,

Sorry for the inconvenience, it's a false positive, the problem is
ARCH=parisc was used to build the 64 bit kernel.

the actual command should be:
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross 
O=build_dir ARCH=parisc64 prepare

Best Regards,
Rong Chen

> 
> If I just download & install gcc-11-hppa64-linux-gnu from Debian, this
> config file builds just fine.
> 
> If I invoke make.cross as you have it here, I see the same error you
> report.
> 
> Adding 'V=1' to this, shows:
>    sh ../scripts/atomic/check-atomics.sh
>    /home/willy/0day/gcc-9.3.0-nolibc/hppa-linux/bin/hppa-linux-gcc [...]
> 
> which is weird, right?  It's not hppa64, and it's not gcc-11.2.  So my
> suspicion here is that there's some bug in your tooling which is reporting
> a bogus error.  You're probably better situated to debug this further
> than I am.
> 
> Oh, and I checked, in case the filename was confusing me:
> $ /home/willy/0day/gcc-9.3.0-nolibc/hppa-linux/bin/hppa-linux-gcc -v
> Using built-in specs.
> COLLECT_GCC=/home/willy/0day/gcc-9.3.0-nolibc/hppa-linux/bin/hppa-linux-gcc
> COLLECT_LTO_WRAPPER=/home/willy/0day/gcc-9.3.0-nolibc/hppa-linux/bin/../libexec/gcc/hppa-linux/9.3.0/lto-wrapper
> Target: hppa-linux
> Configured with: /tmp/build-crosstools-xh/gcc/gcc-9.3.0/configure --target=hppa-linux --enable-targets=all --prefix=/tmp/build-crosstools-xh/cross --enable-languages=c --without-headers --disable-bootstrap --disable-nls --disable-threads --disable-shared --disable-libmudflap --disable-libssp --disable-libgomp --disable-decimal-float --disable-libquadmath --disable-libatomic --disable-libcc1 --disable-libmpx --enable-checking=release
> Thread model: single
> gcc version 9.3.0 (GCC)
> 
> So it really is a 32-bit hppa build, and it really is gcc 9.3, not 11.2.
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