* [linux-next:master 3972/6402] kernel/dma/pool.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup
@ 2020-05-05 8:07 kbuild test robot
2020-05-05 18:19 ` David Rientjes
0 siblings, 1 reply; 3+ messages in thread
From: kbuild test robot @ 2020-05-05 8:07 UTC (permalink / raw)
To: kbuild-all
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: dfd71d381f7e1aa118e0368774aa05f5c4a48870
commit: 82fef0ad811fb5976cf36ccc3d2c3bc0195dfb72 [3972/6402] x86/mm: unencrypted non-blocking DMA allocations use coherent pools
config: x86_64-randconfig-d001-20200502 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 45b7d44ecb01780e26dc8d3c30bc34e32c08dd70)
reproduce:
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
git checkout 82fef0ad811fb5976cf36ccc3d2c3bc0195dfb72
# 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: kbuild test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> kernel/dma/pool.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup
>> kernel/dma/pool.o: warning: objtool: __llvm_gcov_flush()+0x0: call without frame pointer save/setup
--
>> kernel/dma/remap.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup
>> kernel/dma/remap.o: warning: objtool: __llvm_gcov_flush()+0x0: call without frame pointer save/setup
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [linux-next:master 3972/6402] kernel/dma/pool.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup
2020-05-05 8:07 [linux-next:master 3972/6402] kernel/dma/pool.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup kbuild test robot
@ 2020-05-05 18:19 ` David Rientjes
2020-05-05 18:25 ` Nick Desaulniers
0 siblings, 1 reply; 3+ messages in thread
From: David Rientjes @ 2020-05-05 18:19 UTC (permalink / raw)
To: kbuild-all
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On Tue, 5 May 2020, kbuild test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head: dfd71d381f7e1aa118e0368774aa05f5c4a48870
> commit: 82fef0ad811fb5976cf36ccc3d2c3bc0195dfb72 [3972/6402] x86/mm: unencrypted non-blocking DMA allocations use coherent pools
> config: x86_64-randconfig-d001-20200502 (attached as .config)
> compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 45b7d44ecb01780e26dc8d3c30bc34e32c08dd70)
> reproduce:
> 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
> git checkout 82fef0ad811fb5976cf36ccc3d2c3bc0195dfb72
> # 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: kbuild test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> kernel/dma/pool.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup
> >> kernel/dma/pool.o: warning: objtool: __llvm_gcov_flush()+0x0: call without frame pointer save/setup
> --
> >> kernel/dma/remap.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup
> >> kernel/dma/remap.o: warning: objtool: __llvm_gcov_flush()+0x0: call without frame pointer save/setup
>
At commit 82fef0ad811f ("x86/mm: unencrypted non-blocking DMA allocations
use coherent pools") there should be no new kernel/dma/remap.o warnings,
the Kconfig is merely selecting DMA_COHERENT_POOL. The patch series
actually only removed code from kernel/dma/remap.c, it did not add any
code :)
Since there are tons of warnings all over the kernel when building with
this .config (probably because of CONFIG_FRAME_POINTER) I assume this is
unrelated to this particular series or anything that gets introduced in
dma-mapping.git.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [linux-next:master 3972/6402] kernel/dma/pool.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup
2020-05-05 18:19 ` David Rientjes
@ 2020-05-05 18:25 ` Nick Desaulniers
0 siblings, 0 replies; 3+ messages in thread
From: Nick Desaulniers @ 2020-05-05 18:25 UTC (permalink / raw)
To: kbuild-all
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On Tue, May 5, 2020 at 11:19 AM 'David Rientjes' via Clang Built Linux
<clang-built-linux@googlegroups.com> wrote:
>
> On Tue, 5 May 2020, kbuild test robot wrote:
>
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > head: dfd71d381f7e1aa118e0368774aa05f5c4a48870
> > commit: 82fef0ad811fb5976cf36ccc3d2c3bc0195dfb72 [3972/6402] x86/mm: unencrypted non-blocking DMA allocations use coherent pools
> > config: x86_64-randconfig-d001-20200502 (attached as .config)
> > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 45b7d44ecb01780e26dc8d3c30bc34e32c08dd70)
> > reproduce:
> > 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
> > git checkout 82fef0ad811fb5976cf36ccc3d2c3bc0195dfb72
> > # 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: kbuild test robot <lkp@intel.com>
> >
> > All warnings (new ones prefixed by >>):
> >
> > >> kernel/dma/pool.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup
> > >> kernel/dma/pool.o: warning: objtool: __llvm_gcov_flush()+0x0: call without frame pointer save/setup
> > --
> > >> kernel/dma/remap.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup
> > >> kernel/dma/remap.o: warning: objtool: __llvm_gcov_flush()+0x0: call without frame pointer save/setup
> >
>
> At commit 82fef0ad811f ("x86/mm: unencrypted non-blocking DMA allocations
> use coherent pools") there should be no new kernel/dma/remap.o warnings,
> the Kconfig is merely selecting DMA_COHERENT_POOL. The patch series
> actually only removed code from kernel/dma/remap.c, it did not add any
> code :)
>
> Since there are tons of warnings all over the kernel when building with
> this .config (probably because of CONFIG_FRAME_POINTER) I assume this is
> unrelated to this particular series or anything that gets introduced in
> dma-mapping.git.
Yes, this is an unrelated known issue, sorry.
https://github.com/ClangBuiltLinux/linux/issues/955
(We just got clang builds turned on 0day bot, and are now being
drowned in build reports from randconfigs we hadn't previously found.
Which is both good (what I want), and bad (what I don't have time to
fix all the different reports)).
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-05-05 18:25 UTC | newest]
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2020-05-05 8:07 [linux-next:master 3972/6402] kernel/dma/pool.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without frame pointer save/setup kbuild test robot
2020-05-05 18:19 ` David Rientjes
2020-05-05 18:25 ` Nick Desaulniers
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