From: Nick Desaulniers <ndesaulniers@google.com>
To: Nathan Chancellor <nathan@kernel.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: kbuild-all@lists.01.org,
clang-built-linux <clang-built-linux@googlegroups.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
kernel test robot <lkp@intel.com>,
"# 3.4.x" <stable@vger.kernel.org>,
Sasha Levin <sashal@kernel.org>
Subject: Re: [linux-stable-rc:linux-5.4.y 2231/4843] ERROR: "__memcat_p" undefined!
Date: Tue, 23 Feb 2021 11:56:29 -0800 [thread overview]
Message-ID: <CAKwvOdmqso8SmPeZ4tOLP-wFSbkkDAthG1vt6k045_C0JoU4Rg@mail.gmail.com> (raw)
In-Reply-To: <202102151855.H817KoOF-lkp@intel.com>
On Mon, Feb 15, 2021 at 2:49 AM kernel test robot <lkp@intel.com> wrote:
>
> Hi Nick,
>
> First bad commit (maybe != root cause):
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.4.y
> head: 642aa3284e09f63bf1d4832798dd787b4320ca64
> commit: f05f667f8764f9ec834ca3e412ed7f5a20dea3bf [2231/4843] lib/string.c: implement stpcpy
> config: x86_64-randconfig-a005-20210215 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
> 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 x86_64 cross compiling tool for clang build
> # apt-get install binutils-x86-64-linux-gnu
> # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=f05f667f8764f9ec834ca3e412ed7f5a20dea3bf
> git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> git fetch --no-tags linux-stable-rc linux-5.4.y
> git checkout f05f667f8764f9ec834ca3e412ed7f5a20dea3bf
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>):
>
> >> ERROR: "__memcat_p" [drivers/hwtracing/stm/stm_core.ko] undefined!
This error is unrelated to the referenced commit, but we did fix this
error finally in 5.7:
https://github.com/ClangBuiltLinux/linux/issues/515. This is not a
regression, but something that never worked with LLD until 5.7.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7273ad2b08f8ac9563579d16a3cf528857b26f49
looks like the commit of interest, though I seem to have left a
comment implying there were dependencies:
https://github.com/ClangBuiltLinux/linux/issues/515#issuecomment-612999929
(I no longer recall what they were).
Some other commits in tree reference that bug from the issue tracker.
https://github.com/0day-ci/linux/commit/0cf9baa2dbb8ca29f30ac8a1afb69de51f222d17
https://github.com/0day-ci/linux/commit/565508bb949dd72638b52522fb6ac6ec04ec57fc
https://github.com/0day-ci/linux/commit/0d0537aa772566473bd5310be3874060cbff8672
Not sure whether all 4 of the above worth backporting to 4.4.y?
Thoughts? (Perhaps these would allow us to add x86_64 allmodconfig CI
coverage with LLD for 4.4.y)
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
--
Thanks,
~Nick Desaulniers
next prev parent reply other threads:[~2021-02-23 19:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-15 10:49 kernel test robot
2021-02-23 19:56 ` Nick Desaulniers [this message]
2021-02-25 8:22 ` Greg Kroah-Hartman
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