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From: Philip Li <philip.li@intel.com>
To: kbuild-all@lists.01.org
Subject: Re: [linux-stable-rc:queue/5.4 109/220] /tmp/filter-273424.s:50187: Error: bad expression
Date: Wed, 08 Jul 2020 09:29:32 +0800
Message-ID: <20200708012932.GA18919@intel.com>
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On Tue, Jul 07, 2020 at 10:01:12AM -0700, Nick Desaulniers wrote:
> On Mon, Jul 6, 2020 at 7:33 PM Nathan Chancellor
> <natechancellor@gmail.com> wrote:
> >
> > On Mon, Jul 06, 2020 at 10:01:07AM -0700, 'Nick Desaulniers' via Clang =
Built Linux wrote:
> > > On Mon, Jul 6, 2020 at 12:20 AM kernel test robot <lkp@intel.com> w=
rote:
> > > >
> > > > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linu=
x-stable-rc.git queue/5.4
> > > > head:   bb26a37d5a4bf25b8377c83fa407a219b3822ed1
> > > > commit: 5cee9e67596f7d694e94d7def7cd9d65a7599f66 [109/220] i2c: cor=
e: check returned size of emulated smbus block read
> > > > config: s390-randconfig-r024-20200706 (attached as .config)
> > > > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-projec=
t a378c0449507e00e96534ff9ce9034e185425182)
> > > > reproduce (this is a W=3D1 build):
> > > >         wget https://raw.githubusercontent.com/intel/lkp-tests/mast=
er/sbin/make.cross -O ~/bin/make.cross
> > > >         chmod +x ~/bin/make.cross
> > > >         # install s390 cross compiling tool for clang build
> > > >         # apt-get install binutils-s390x-linux-gnu
> > > >         git checkout 5cee9e67596f7d694e94d7def7cd9d65a7599f66
> > > >         # save the attached .config to linux build tree
> > > >         COMPILER_INSTALL_PATH=3D$HOME/0day COMPILER=3Dclang make.cr=
oss ARCH=3Ds390
> > > >
> > > > If you fix the issue, kindly add following tag as appropriate
> > > > Reported-by: kernel test robot <lkp@intel.com>
> > > >
> > > > Note: the linux-stable-rc/queue/5.4 HEAD bb26a37d5a4bf25b8377c83fa4=
07a219b3822ed1 builds fine.
> > > >       It only hurts bisectibility.
> >
> > Is this note talking about the config in general? Because that config
> > does not build at all... I see this over and over, even on mainline
> > (note that this report is initially against 5.4, which does not build
> > with versions of clang that support asm goto):
> >
> > ./arch/s390/include/asm/bitops.h:69:4: error: invalid operand in inline=
 asm: 'oi        $0,${1:b}'
> >                         "oi     %0,%b1\n"
> >                         ^
> > ./arch/s390/include/asm/bitops.h:90:4: error: invalid operand in inline=
 asm: 'ni        $0,${1:b}'
> >                         "ni     %0,%b1\n"
> >                         ^
> >
> > This might be solved with commit c4e5c229b610 ("s390/jump_label: use "i"
> > constraint for clang").
> =

> Looks like c4e5c229b610, should we ask stable to backport to 5.4?  I
> don't think we had clang builds working for 5.4 for s390, so maybe we
> should just Philip to disable Clang builds of this stable branch for
> s390? (There may not be too many backports to support, but I don't
Got it, we will disable s390 for the linux-stable-rc.

BTW: does the bot need switch to use clang's as instead of gnu's?

> know the amount of work involved there).
> =

> =

> -- =

> Thanks,
> ~Nick Desaulniers
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