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SubjectRe: [PATCH v3 2/2] kernel.h: handle pointers to arrays better in container_of()
Hi Ian,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.12-rc2 next-20170524]
[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/Ian-Abbott/kernel-h-container_of-pointer-checking/20170524-071605
config: x86_64-randconfig-n0-05242055 (attached as .config)
compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

In file included from include/linux/kernel.h:14:0,
from include/asm-generic/bug.h:15,
from arch/x86/include/asm/bug.h:81,
from drivers/block/drbd/drbd_interval.c:1:
include/linux/bug.h:103:47: warning: 'struct bug_entry' declared inside parameter list [enabled by default]
static inline int is_warning_bug(const struct bug_entry *bug)
^
include/linux/bug.h:103:47: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
include/linux/bug.h: In function 'is_warning_bug':
>> include/linux/bug.h:105:12: error: dereferencing pointer to incomplete type
return bug->flags & BUGFLAG_WARNING;
^

vim +105 include/linux/bug.h

ff20c2e0 Kirill A. Shutemov 2016-03-01 97
35edd910 Paul Gortmaker 2011-11-16 98 #endif /* __CHECKER__ */
35edd910 Paul Gortmaker 2011-11-16 99
7664c5a1 Jeremy Fitzhardinge 2006-12-08 100 #ifdef CONFIG_GENERIC_BUG
7664c5a1 Jeremy Fitzhardinge 2006-12-08 101 #include <asm-generic/bug.h>
7664c5a1 Jeremy Fitzhardinge 2006-12-08 102
7664c5a1 Jeremy Fitzhardinge 2006-12-08 @103 static inline int is_warning_bug(const struct bug_entry *bug)
7664c5a1 Jeremy Fitzhardinge 2006-12-08 104 {
7664c5a1 Jeremy Fitzhardinge 2006-12-08 @105 return bug->flags & BUGFLAG_WARNING;
7664c5a1 Jeremy Fitzhardinge 2006-12-08 106 }
7664c5a1 Jeremy Fitzhardinge 2006-12-08 107
19d43626 Peter Zijlstra 2017-02-25 108 struct bug_entry *find_bug(unsigned long bugaddr);

:::::: The code at line 105 was first introduced by commit
:::::: 7664c5a1da4711bb6383117f51b94c8dc8f3f1cd [PATCH] Generic BUG implementation

:::::: TO: Jeremy Fitzhardinge <jeremy@goop.org>
:::::: CC: Linus Torvalds <torvalds@woody.osdl.org>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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