[linux-stable-rc:linux-4.19.y 9916/9999] drivers/pinctrl/pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_group_get()+0x12: unsupported stack pointer realignment

[kbuild test robot]

Hi Dirk,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
head: 6e19c6f2d2653aebd7d307ec43293f579e21604f
commit: 621f2ded601546119fabccd1651b1ae29d26cd38 [9916/9999] scripts/dtc: Remove redundant YYLOC global declaration
config: x86_64-randconfig-d003-20200407 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3185881d69022e03b300e189838b0599ed417be5)
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 621f2ded601546119fabccd1651b1ae29d26cd38
# save the attached .config to linux build tree
COMPILER=clang make.cross ARCH=x86_64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <l...@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/pinctrl/pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_group_get()+0x12: unsupported stack pointer realignment
>> drivers/pinctrl/pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_group_get()+0x0: stack state mismatch: cfa1=7+136 cfa2=7+8

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuil...@lists.01.org

[Nick Desaulniers]

Apologies that the bot keeps converging on this patch; it's not the
source of the regression. The build was red with ToT LLVM before this
patch landed; after the patch landed this warning seemed new, so the
bot converged its bisection on this commit.

Also, we recently turned on Clang builds for 0day bot, so it's digging
up interesting bugs via randconfig testing. This is useful and we
appreciate the reports, especially ones from objtool frequently find
compiler bugs.

I've filed https://github.com/ClangBuiltLinux/linux/issues/977 for me
to follow up on.

--
Thanks,
~Nick Desaulniers

[Philip Li]

On Tue, Apr 07, 2020 at 10:51:38AM -0700, Nick Desaulniers wrote:
> On Tue, Apr 7, 2020 at 9:11 AM kbuild test robot <l...@intel.com> wrote:
> >
> > Hi Dirk,
> >
> > First bad commit (maybe != root cause):
> >
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
> > head: 6e19c6f2d2653aebd7d307ec43293f579e21604f
> > commit: 621f2ded601546119fabccd1651b1ae29d26cd38 [9916/9999] scripts/dtc: Remove redundant YYLOC global declaration
> > config: x86_64-randconfig-d003-20200407 (attached as .config)
> > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3185881d69022e03b300e189838b0599ed417be5)
> > reproduce:
> > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> > chmod +x ~/bin/make.cross
> > git checkout 621f2ded601546119fabccd1651b1ae29d26cd38
> > # save the attached .config to linux build tree
> > COMPILER=clang make.cross ARCH=x86_64
> >
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kbuild test robot <l...@intel.com>
> >
> > All warnings (new ones prefixed by >>):
> >
> > >> drivers/pinctrl/pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_group_get()+0x12: unsupported stack pointer realignment
> > >> drivers/pinctrl/pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_group_get()+0x0: stack state mismatch: cfa1=7+136 cfa2=7+8
>
> Apologies that the bot keeps converging on this patch; it's not the
> source of the regression. The build was red with ToT LLVM before this
> patch landed; after the patch landed this warning seemed new, so the
> bot converged its bisection on this commit.

Sorry for the false positive bisection, we will think of this further.
Hi Nick, do you think the bot need blacklist this or send similar objtool
to clang mailing list only?

>
> Also, we recently turned on Clang builds for 0day bot, so it's digging
> up interesting bugs via randconfig testing. This is useful and we
> appreciate the reports, especially ones from objtool frequently find
> compiler bugs.
>
> I've filed https://github.com/ClangBuiltLinux/linux/issues/977 for me
> to follow up on.
>
> --
> Thanks,
> ~Nick Desaulniers

> _______________________________________________
> kbuild-all mailing list -- kbuil...@lists.01.org
> To unsubscribe send an email to kbuild-a...@lists.01.org

[Nick Desaulniers]

Maybe for now with the goal to eventually revert, if it's easy for you
to do so, it might be a good idea. In general, developers should pay
attention to new objtool warnings they introduce, but so far all
reports from objtool with clang builds have been clang bugs in my
experience. Once we're in better shape, then maybe we can remove the
diversion of the failure reports?

>
> >
> > Also, we recently turned on Clang builds for 0day bot, so it's digging
> > up interesting bugs via randconfig testing. This is useful and we
> > appreciate the reports, especially ones from objtool frequently find
> > compiler bugs.
> >
> > I've filed https://github.com/ClangBuiltLinux/linux/issues/977 for me
> > to follow up on.
> >
> > --
> > Thanks,
> > ~Nick Desaulniers
> > _______________________________________________
> > kbuild-all mailing list -- kbuil...@lists.01.org
> > To unsubscribe send an email to kbuild-a...@lists.01.org

--
Thanks,
~Nick Desaulniers

[Philip Li]

got it, thanks for advice, we will update bot logic to send objtool
related report to clang list only.