* WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in reference from the function stop_machine() to the function .init.text:intel_rng_hw_init()
@ 2021-02-24 14:20 kernel test robot
2021-02-24 14:26 ` Jürgen Groß
0 siblings, 1 reply; 5+ messages in thread
From: kernel test robot @ 2021-02-24 14:20 UTC (permalink / raw)
To: Juergen Gross
Cc: kbuild-all, clang-built-linux, linux-kernel, Borislav Petkov
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c03c21ba6f4e95e406a1a7b4c34ef334b977c194
commit: ab234a260b1f625b26cbefa93ca365b0ae66df33 x86/pv: Rework arch_local_irq_restore() to not use popf
date: 2 weeks ago
config: x86_64-randconfig-a005-20210223 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project f14a14dd2564703db02f80c00db8ae492b594f77)
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/torvalds/linux.git/commit/?id=ab234a260b1f625b26cbefa93ca365b0ae66df33
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout ab234a260b1f625b26cbefa93ca365b0ae66df33
# 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 warnings (new ones prefixed by >>, old ones prefixed by <<):
>> WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in reference from the function stop_machine() to the function .init.text:intel_rng_hw_init()
The function stop_machine() references
the function __init intel_rng_hw_init().
This is often because stop_machine lacks a __init
annotation or the annotation of intel_rng_hw_init is wrong.
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in reference from the function stop_machine() to the function .init.text:intel_rng_hw_init()
2021-02-24 14:20 WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in reference from the function stop_machine() to the function .init.text:intel_rng_hw_init() kernel test robot
@ 2021-02-24 14:26 ` Jürgen Groß
2021-02-25 8:17 ` [kbuild-all] " Rong Chen
0 siblings, 1 reply; 5+ messages in thread
From: Jürgen Groß @ 2021-02-24 14:26 UTC (permalink / raw)
To: kernel test robot
Cc: kbuild-all, clang-built-linux, linux-kernel, Borislav Petkov
[-- Attachment #1.1.1: Type: text/plain, Size: 1951 bytes --]
On 24.02.21 15:20, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: c03c21ba6f4e95e406a1a7b4c34ef334b977c194
> commit: ab234a260b1f625b26cbefa93ca365b0ae66df33 x86/pv: Rework arch_local_irq_restore() to not use popf
> date: 2 weeks ago
> config: x86_64-randconfig-a005-20210223 (attached as .config)
> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project f14a14dd2564703db02f80c00db8ae492b594f77)
> 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/torvalds/linux.git/commit/?id=ab234a260b1f625b26cbefa93ca365b0ae66df33
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout ab234a260b1f625b26cbefa93ca365b0ae66df33
> # 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 warnings (new ones prefixed by >>, old ones prefixed by <<):
>
>>> WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in reference from the function stop_machine() to the function .init.text:intel_rng_hw_init()
> The function stop_machine() references
> the function __init intel_rng_hw_init().
> This is often because stop_machine lacks a __init
> annotation or the annotation of intel_rng_hw_init is wrong.
I'd be very interested to know how the identified patch would be able to
have this effect.
Juergen
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [kbuild-all] Re: WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in reference from the function stop_machine() to the function .init.text:intel_rng_hw_init()
2021-02-24 14:26 ` Jürgen Groß
@ 2021-02-25 8:17 ` Rong Chen
2021-02-25 18:34 ` Nathan Chancellor
0 siblings, 1 reply; 5+ messages in thread
From: Rong Chen @ 2021-02-25 8:17 UTC (permalink / raw)
To: Jürgen Groß, kernel test robot
Cc: kbuild-all, clang-built-linux, linux-kernel, Borislav Petkov,
Nick Desaulniers
On 2/24/21 10:26 PM, Jürgen Groß wrote:
> On 24.02.21 15:20, kernel test robot wrote:
>> tree:
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>> master
>> head: c03c21ba6f4e95e406a1a7b4c34ef334b977c194
>> commit: ab234a260b1f625b26cbefa93ca365b0ae66df33 x86/pv: Rework
>> arch_local_irq_restore() to not use popf
>> date: 2 weeks ago
>> config: x86_64-randconfig-a005-20210223 (attached as .config)
>> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
>> f14a14dd2564703db02f80c00db8ae492b594f77)
>> 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/torvalds/linux.git/commit/?id=ab234a260b1f625b26cbefa93ca365b0ae66df33
>> git remote add linus
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>> git fetch --no-tags linus master
>> git checkout ab234a260b1f625b26cbefa93ca365b0ae66df33
>> # 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 warnings (new ones prefixed by >>, old ones prefixed by <<):
>>
>>>> WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in
>>>> reference from the function stop_machine() to the function
>>>> .init.text:intel_rng_hw_init()
>> The function stop_machine() references
>> the function __init intel_rng_hw_init().
>> This is often because stop_machine lacks a __init
>> annotation or the annotation of intel_rng_hw_init is wrong.
>
> I'd be very interested to know how the identified patch would be able to
> have this effect.
Hi Clang Team,
The problem is found by the latest clang, and I can't reproduce it with
clang-11,
could you take a look?
Best Regards,
Rong Chen
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [kbuild-all] Re: WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in reference from the function stop_machine() to the function .init.text:intel_rng_hw_init()
2021-02-25 8:17 ` [kbuild-all] " Rong Chen
@ 2021-02-25 18:34 ` Nathan Chancellor
2021-02-25 21:15 ` Nick Desaulniers
0 siblings, 1 reply; 5+ messages in thread
From: Nathan Chancellor @ 2021-02-25 18:34 UTC (permalink / raw)
To: Rong Chen
Cc: Jürgen Groß,
kernel test robot, kbuild-all, clang-built-linux, linux-kernel,
Borislav Petkov, Nick Desaulniers
On Thu, Feb 25, 2021 at 04:17:21PM +0800, Rong Chen wrote:
>
>
> On 2/24/21 10:26 PM, Jürgen Groß wrote:
> > On 24.02.21 15:20, kernel test robot wrote:
> > > tree:
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> > > master
> > > head: c03c21ba6f4e95e406a1a7b4c34ef334b977c194
> > > commit: ab234a260b1f625b26cbefa93ca365b0ae66df33 x86/pv: Rework
> > > arch_local_irq_restore() to not use popf
> > > date: 2 weeks ago
> > > config: x86_64-randconfig-a005-20210223 (attached as .config)
> > > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
> > > f14a14dd2564703db02f80c00db8ae492b594f77)
> > > 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/torvalds/linux.git/commit/?id=ab234a260b1f625b26cbefa93ca365b0ae66df33
> > > git remote add linus
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> > > git fetch --no-tags linus master
> > > git checkout ab234a260b1f625b26cbefa93ca365b0ae66df33
> > > # 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 warnings (new ones prefixed by >>, old ones prefixed by <<):
> > >
> > > > > WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section
> > > > > mismatch in reference from the function stop_machine() to
> > > > > the function .init.text:intel_rng_hw_init()
> > > The function stop_machine() references
> > > the function __init intel_rng_hw_init().
> > > This is often because stop_machine lacks a __init
> > > annotation or the annotation of intel_rng_hw_init is wrong.
> >
> > I'd be very interested to know how the identified patch would be able to
> > have this effect.
>
> Hi Clang Team,
>
> The problem is found by the latest clang, and I can't reproduce it with
> clang-11,
> could you take a look?
>
> Best Regards,
> Rong Chen
Hi Rong,
Known issue. LLVM 13 cut over to the new pass manager (NPM) which has
changed some of the inlining heuristics. I would probably recommend
cutting over to the "release/12.x" branch for now, which should be more
up to date but also stable.
Additionally, Arnd sent a fix for this particular warning here:
https://lore.kernel.org/lkml/20210225130153.1956990-1-arnd@kernel.org/
Cheers,
Nathan
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [kbuild-all] Re: WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in reference from the function stop_machine() to the function .init.text:intel_rng_hw_init()
2021-02-25 18:34 ` Nathan Chancellor
@ 2021-02-25 21:15 ` Nick Desaulniers
0 siblings, 0 replies; 5+ messages in thread
From: Nick Desaulniers @ 2021-02-25 21:15 UTC (permalink / raw)
To: Nathan Chancellor, Rong Chen, Jürgen Groß
Cc: kernel test robot, kbuild-all, clang-built-linux, LKML, Borislav Petkov
On Thu, Feb 25, 2021 at 10:34 AM Nathan Chancellor <nathan@kernel.org> wrote:
>
> On Thu, Feb 25, 2021 at 04:17:21PM +0800, Rong Chen wrote:
> >
> >
> > On 2/24/21 10:26 PM, Jürgen Groß wrote:
> > > On 24.02.21 15:20, kernel test robot wrote:
> > > > tree:
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> > > > master
> > > > head: c03c21ba6f4e95e406a1a7b4c34ef334b977c194
> > > > commit: ab234a260b1f625b26cbefa93ca365b0ae66df33 x86/pv: Rework
> > > > arch_local_irq_restore() to not use popf
> > > > date: 2 weeks ago
> > > > config: x86_64-randconfig-a005-20210223 (attached as .config)
> > > > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
> > > > f14a14dd2564703db02f80c00db8ae492b594f77)
> > > > 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/torvalds/linux.git/commit/?id=ab234a260b1f625b26cbefa93ca365b0ae66df33
> > > > git remote add linus
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> > > > git fetch --no-tags linus master
> > > > git checkout ab234a260b1f625b26cbefa93ca365b0ae66df33
> > > > # 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 warnings (new ones prefixed by >>, old ones prefixed by <<):
> > > >
> > > > > > WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section
> > > > > > mismatch in reference from the function stop_machine() to
> > > > > > the function .init.text:intel_rng_hw_init()
> > > > The function stop_machine() references
> > > > the function __init intel_rng_hw_init().
> > > > This is often because stop_machine lacks a __init
> > > > annotation or the annotation of intel_rng_hw_init is wrong.
> > >
> > > I'd be very interested to know how the identified patch would be able to
> > > have this effect.
Sorry, this looks like fallout from a recent LLVM change, see also:
https://lore.kernel.org/lkml/CAKwvOd=B=cHpp_XfPTtyVpQyrwQrFZX9SXKw=SJC1VC-VbEwFA@mail.gmail.com/
> >
> > Hi Clang Team,
> >
> > The problem is found by the latest clang, and I can't reproduce it with
> > clang-11,
> > could you take a look?
> >
> > Best Regards,
> > Rong Chen
>
> Hi Rong,
>
> Known issue. LLVM 13 cut over to the new pass manager (NPM) which has
> changed some of the inlining heuristics. I would probably recommend
> cutting over to the "release/12.x" branch for now, which should be more
ehh...we still want coverage of ToT LLVM though, to spot potential
issues like this. I'd take both (clang-12 and 13) if possible; both
are pre-release and still undergoing active development.
> up to date but also stable.
>
> Additionally, Arnd sent a fix for this particular warning here:
> https://lore.kernel.org/lkml/20210225130153.1956990-1-arnd@kernel.org/
Looks like it got picked up by akpm@ in -mm?
>
> Cheers,
> Nathan
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-02-25 21:16 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2021-02-24 14:20 WARNING: modpost: vmlinux.o(.text+0x1a8edb8): Section mismatch in reference from the function stop_machine() to the function .init.text:intel_rng_hw_init() kernel test robot
2021-02-24 14:26 ` Jürgen Groß
2021-02-25 8:17 ` [kbuild-all] " Rong Chen
2021-02-25 18:34 ` Nathan Chancellor
2021-02-25 21:15 ` Nick Desaulniers
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