linux-kernel - include/linux/bug.h:93:12: error: dereferencing pointer to incomplete type

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Message-ID: <201603070654.bDZVusoD%fengguang.wu@intel.com>
Date:	Mon, 7 Mar 2016 06:08:59 +0800
From:	kbuild test robot <fengguang.wu@...el.com>
To:	Josh Triplett <josh@...htriplett.org>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Memory Management List <linux-mm@...ck.org>
Subject: include/linux/bug.h:93:12: error: dereferencing pointer to
 incomplete type

Hi Josh,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   67944024c1cdd897e49a09b0d6af3ea38d1388ca
commit: 5d2acfc7b974bbd3858b4dd3f2cdc6362dd8843a kconfig: make allnoconfig disable options behind EMBEDDED and EXPERT
date:   1 year, 11 months ago
config: mn10300-allnoconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 5d2acfc7b974bbd3858b4dd3f2cdc6362dd8843a
        # save the attached .config to linux build tree
        make.cross ARCH=mn10300 

All errors (new ones prefixed by >>):

   In file included from include/linux/page-flags.h:9:0,
                    from kernel/bounds.c:9:
   include/linux/bug.h:91:47: warning: 'struct bug_entry' declared inside parameter list
    static inline int is_warning_bug(const struct bug_entry *bug)
                                                  ^
   include/linux/bug.h:91:47: warning: its scope is only this definition or declaration, which is probably not what you want
   include/linux/bug.h: In function 'is_warning_bug':
>> include/linux/bug.h:93:12: error: dereferencing pointer to incomplete type
     return bug->flags & BUGFLAG_WARNING;
               ^
   make[2]: *** [kernel/bounds.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +93 include/linux/bug.h

35edd910 Paul Gortmaker      2011-11-16  85  
35edd910 Paul Gortmaker      2011-11-16  86  #endif	/* __CHECKER__ */
35edd910 Paul Gortmaker      2011-11-16  87  
7664c5a1 Jeremy Fitzhardinge 2006-12-08  88  #ifdef CONFIG_GENERIC_BUG
7664c5a1 Jeremy Fitzhardinge 2006-12-08  89  #include <asm-generic/bug.h>
7664c5a1 Jeremy Fitzhardinge 2006-12-08  90  
7664c5a1 Jeremy Fitzhardinge 2006-12-08 @91  static inline int is_warning_bug(const struct bug_entry *bug)
7664c5a1 Jeremy Fitzhardinge 2006-12-08  92  {
7664c5a1 Jeremy Fitzhardinge 2006-12-08 @93  	return bug->flags & BUGFLAG_WARNING;
7664c5a1 Jeremy Fitzhardinge 2006-12-08  94  }
7664c5a1 Jeremy Fitzhardinge 2006-12-08  95  
7664c5a1 Jeremy Fitzhardinge 2006-12-08  96  const struct bug_entry *find_bug(unsigned long bugaddr);

:::::: The code at line 93 was first introduced by commit
:::::: 7664c5a1da4711bb6383117f51b94c8dc8f3f1cd [PATCH] Generic BUG implementation

:::::: TO: Jeremy Fitzhardinge <jeremy@...p.org>
:::::: CC: Linus Torvalds <torvalds@...dy.osdl.org>

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