linux-kernel - Re: [PATCH 1/4] Add BUG

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Message-ID: <CA+ekxPUs+8v9RysYwzQZyjrn9mkwFSpSKg3UnthJvrzxt9q0qA@mail.gmail.com>
Date:	Mon, 1 Feb 2016 13:36:19 -0700
From:	Jeffrey Merkey <jeffmerkey@...il.com>
To:	kbuild test robot <lkp@...el.com>
Cc:	kbuild-all@...org, hpa@...or.com, linux-kernel@...r.kernel.org,
	mingo@...hat.com, tglx@...utronix.de, x86@...nel.org
Subject: Re: [PATCH 1/4] Add BUG_XX() debugging options

On 2/1/16, Jeffrey Merkey <jeffmerkey@...il.com> wrote:
> On 2/1/16, kbuild test robot <lkp@...el.com> wrote:
>> Hi Jeffrey,
>>
>> [auto build test WARNING on v4.5-rc2]
>> [also build test WARNING on next-20160201]
>> [cannot apply to tip/x86/core]
>> [if your patch is applied to the wrong git tree, please drop us a note to
>> help improving the system]
>>
>> url:
>> https://github.com/0day-ci/linux/commits/Jeffrey-Merkey/Add-BUG_XX-debugging-options/20160202-040506
>> config: x86_64-randconfig-x012-201605 (attached as .config)
>> reproduce:
>>         # save the attached .config to linux build tree
>>         make ARCH=x86_64
>>
>> All warnings (new ones prefixed by >>):
>>
>>    In file included from include/linux/bug.h:4:0,
>>                     from include/linux/page-flags.h:9,
>>                     from kernel/bounds.c:9:
>>>> arch/x86/include/asm/bug.h:14:5: warning: "CONFIG_DEBUG_BUG" is not
>>>> defined [-Wundef]
>>     #if CONFIG_DEBUG_BUG
>>         ^
>> --
>>    In file included from include/linux/bug.h:4:0,
>>                     from include/linux/page-flags.h:9,
>>                     from kernel/bounds.c:9:
>>>> arch/x86/include/asm/bug.h:14:5: warning: "CONFIG_DEBUG_BUG" is not
>>>> defined [-Wundef]
>>     #if CONFIG_DEBUG_BUG
>>         ^
>>    In file included from include/linux/bug.h:4:0,
>>                     from include/linux/crypto.h:23,
>>                     from arch/x86/kernel/asm-offsets.c:8:
>>>> arch/x86/include/asm/bug.h:14:5: warning: "CONFIG_DEBUG_BUG" is not
>>>> defined [-Wundef]
>>     #if CONFIG_DEBUG_BUG
>>         ^
>>
>> vim +/CONFIG_DEBUG_BUG +14 arch/x86/include/asm/bug.h
>>
>>      1	#ifndef _ASM_X86_BUG_H
>>      2	#define _ASM_X86_BUG_H
>>      3	
>>      4	#define HAVE_ARCH_BUG
>>      5	
>>      6	#ifdef CONFIG_DEBUG_BUGVERBOSE
>>      7	
>>      8	#ifdef CONFIG_X86_32
>>      9	# define __BUG_C0	"2:\t.long 1b, %c0\n"
>>     10	#else
>>     11	# define __BUG_C0	"2:\t.long 1b - 2b, %c0 - 2b\n"
>>     12	#endif
>>     13	
>>   > 14	#if CONFIG_DEBUG_BUG
>>     15	#define BUG()							\
>>     16	do {								\
>>     17		asm volatile("int3");					\
>>     18		unreachable();						\
>>     19	} while (0)
>>     20	#else
>>     21	#define BUG()							\
>>     22	do {								\
>>
>> ---
>> 0-DAY kernel test infrastructure                Open Source Technology
>> Center
>> https://lists.01.org/pipermail/kbuild-all                   Intel
>> Corporation
>>
>
>
> I am looking at this one, but I'm not sure what the point is of
> running a test to build something where the defines are ignored.  Is
> this file off limits to use CONFIG options in the build?
>
> Jeff
>

Never mind.  I just found it.  LOL

:-)

Jeff