linux-kernel - Re: arch/s390/include/asm/atomic_ops.h:56:45: error: invalid operand for inline asm constraint 'i'

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Message-ID: <CAKwvOdmZSf2zKaqO3ivorYd9D+yALo5-6hctsSuaK6h2Ywwedw@mail.gmail.com>
Date:   Fri, 21 Aug 2020 18:13:13 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Ulrich Weigand <Ulrich.Weigand@...ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>
Cc:     kbuild-all@...ts.01.org,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Heiko Carstens <hca@...ux.ibm.com>
Subject: Re: arch/s390/include/asm/atomic_ops.h:56:45: error: invalid operand
 for inline asm constraint 'i'

On Thu, Aug 20, 2020 at 12:35 AM kernel test robot <lkp@...el.com> wrote:
>
> Hi Vasily,
>
> FYI, the error/warning still remains.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   18445bf405cb331117bc98427b1ba6f12418ad17
> commit: f0cbd3b83ed47803df941865f720934c69abb803 s390/atomic: circumvent gcc 10 build regression
> date:   9 days ago
> config: s390-randconfig-r003-20200818 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 4deda57106f7c9b982a49cb907c33e3966c8de7f)
> 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 s390 cross compiling tool for clang build
>         # apt-get install binutils-s390x-linux-gnu
>         git checkout f0cbd3b83ed47803df941865f720934c69abb803
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
>    In file included from drivers/tty/tty_buffer.c:8:
>    In file included from include/linux/tty.h:5:
>    In file included from include/linux/fs.h:6:
>    In file included from include/linux/wait_bit.h:8:
>    In file included from include/linux/wait.h:7:
>    In file included from include/linux/list.h:9:
>    In file included from include/linux/kernel.h:12:
>    In file included from include/linux/bitops.h:29:
>    In file included from arch/s390/include/asm/bitops.h:39:
> >> arch/s390/include/asm/atomic_ops.h:56:45: error: invalid operand for inline asm constraint 'i'
>    __ATOMIC_CONST_OPS(__atomic_add_const, int, "asi")
>                                                ^

It might be interesting to dissect this one.  Likely will break the
build otherwise.

>    1 error generated.
>
> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f0cbd3b83ed47803df941865f720934c69abb803
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout f0cbd3b83ed47803df941865f720934c69abb803
> vim +/i +56 arch/s390/include/asm/atomic_ops.h
>
> 126b30c3cb476c Martin Schwidefsky 2016-11-11  51
> eb3b7b848fb3dd Martin Schwidefsky 2017-03-24  52  #define __ATOMIC_CONST_OPS(op_name, op_type, op_string)                       \
> eb3b7b848fb3dd Martin Schwidefsky 2017-03-24  53        __ATOMIC_CONST_OP(op_name, op_type, op_string, "\n")            \
> eb3b7b848fb3dd Martin Schwidefsky 2017-03-24  54        __ATOMIC_CONST_OP(op_name##_barrier, op_type, op_string, "bcr 14,0\n")
> eb3b7b848fb3dd Martin Schwidefsky 2017-03-24  55
> eb3b7b848fb3dd Martin Schwidefsky 2017-03-24 @56  __ATOMIC_CONST_OPS(__atomic_add_const, int, "asi")
> eb3b7b848fb3dd Martin Schwidefsky 2017-03-24  57  __ATOMIC_CONST_OPS(__atomic64_add_const, long, "agsi")
> eb3b7b848fb3dd Martin Schwidefsky 2017-03-24  58
>
> :::::: The code at line 56 was first introduced by commit
> :::::: eb3b7b848fb3dd00f7a57d633d4ae4d194aa7865 s390/rwlock: introduce rwlock wait queueing
>
> :::::: TO: Martin Schwidefsky <schwidefsky@...ibm.com>
> :::::: CC: Martin Schwidefsky <schwidefsky@...ibm.com>
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
>
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-- 
Thanks,
~Nick Desaulniers