linux-kernel - Re: [tip:locking/core 36/40] arch/x86/include/asm/refcount.h:21:2: error: expected ':' or ')' before 'ASM

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Date:   Thu, 17 Aug 2017 07:55:53 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     kbuild test robot <fengguang.wu@...el.com>
Cc:     Kees Cook <keescook@...omium.org>, kbuild-all@...org,
        linux-kernel@...r.kernel.org, tipbuild@...or.com,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [tip:locking/core 36/40] arch/x86/include/asm/refcount.h:21:2:
 error: expected ':' or ')' before 'ASM_UNREACHABLE'

On Thu, Aug 17, 2017 at 06:33:35PM +0800, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking/core
> head:   52fa5bc5cbba089f09bc2c372e3432f3f3e48051
> commit: 7a46ec0e2f4850407de5e1d19a44edee6efa58ec [36/40] locking/refcounts, x86/asm: Implement fast refcount overflow protection
> config: i386-tinyconfig (attached as .config)
> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> reproduce:
>         git checkout 7a46ec0e2f4850407de5e1d19a44edee6efa58ec
>         # save the attached .config to linux build tree
>         make ARCH=i386 
> 
> All error/warnings (new ones prefixed by >>):
> 
>    In file included from include/linux/refcount.h:57:0,
>                     from include/linux/kref.h:19,
>                     from include/linux/kobject.h:24,
>                     from include/linux/irqdesc.h:5,
>                     from include/linux/irq.h:495,
>                     from arch/x86/include/asm/hardirq.h:5,
>                     from include/linux/hardirq.h:8,
>                     from arch/x86/kernel/asm-offsets.c:11:
>    arch/x86/include/asm/refcount.h: In function 'refcount_add':
> >> arch/x86/include/asm/refcount.h:21:2: error: expected ':' or ')' before 'ASM_UNREACHABLE'

This needs the ASM_UNREACHABLE macro from the tip/x86/asm branch.

-- 
Josh