linux-kernel - Re: [PATCH v2 2/2] x86/purgatory: Fix sparse warning, symbol not declared

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Message-ID: <201702130526.PdhS2gXh%fengguang.wu@intel.com>
Date:   Mon, 13 Feb 2017 06:08:18 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Tobin C. Harding" <me@...in.cc>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        "Tobin C. Harding" <me@...in.cc>
Subject: Re: [PATCH v2 2/2] x86/purgatory: Fix sparse warning, symbol not
 declared

Hi Tobin,

[auto build test ERROR on tip/x86/core]
[also build test ERROR on v4.10-rc8 next-20170210]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Tobin-C-Harding/x86-purgatory-Fix-sparse-warnings/20170213-051217
config: x86_64-randconfig-x001-201707 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86/purgatory/purgatory.h: Assembler messages:
>> arch/x86/purgatory/purgatory.h:4: Error: no such instruction: `extern void purgatory(void)'
   make[2]: *** [arch/x86/purgatory/setup-x86_64.o] Error 1
   make[2]: Target 'arch/x86/purgatory/kexec-purgatory.c' not remade because of errors.
   make[1]: *** [archprepare] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +4 arch/x86/purgatory/purgatory.h

     1	#ifndef PURGATORY_H
     2	#define PURGATORY_H
     3	
   > 4	extern void purgatory(void);
     5	
     6	#endif /* PURGATORY_H */
     7	

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0-DAY kernel test infrastructure                Open Source Technology Center
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