Re: [PATCH net-next] netfilter: conntrack: add a new NF_CT_EXT_EXPAND extension

[kbuild test robot <lkp@intel.com>]

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Hi Lin,

[auto build test ERROR on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Lin-Zhang/netfilter-conntrack-add-a-new-NF_CT_EXT_EXPAND-extension/20170627-000844
config: blackfin-allyesconfig (attached as .config)
compiler: bfin-uclinux-gcc (GCC) 6.2.0
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=blackfin 

All error/warnings (new ones prefixed by >>):

   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from net/netfilter/nf_conntrack_core.c:17:
   In function 'total_extension_size',
       inlined from 'nf_conntrack_init_start' at net/netfilter/nf_conntrack_core.c:1893:2:
>> include/linux/compiler.h:529:38: error: call to '__compiletime_assert_1859' declared with attribute error: BUILD_BUG_ON failed: NF_CT_EXT_NUM > 9
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
                                         ^
   include/linux/compiler.h:512:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler.h:529:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/bug.h:54:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/bug.h:78:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
     ^~~~~~~~~~~~~~~~
>> net/netfilter/nf_conntrack_core.c:1859:2: note: in expansion of macro 'BUILD_BUG_ON'
     BUILD_BUG_ON(NF_CT_EXT_NUM > 9);
     ^~~~~~~~~~~~
--
   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from net//netfilter/nf_conntrack_core.c:17:
   In function 'total_extension_size',
       inlined from 'nf_conntrack_init_start' at net//netfilter/nf_conntrack_core.c:1893:2:
>> include/linux/compiler.h:529:38: error: call to '__compiletime_assert_1859' declared with attribute error: BUILD_BUG_ON failed: NF_CT_EXT_NUM > 9
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
                                         ^
   include/linux/compiler.h:512:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler.h:529:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/bug.h:54:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/bug.h:78:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
     ^~~~~~~~~~~~~~~~
   net//netfilter/nf_conntrack_core.c:1859:2: note: in expansion of macro 'BUILD_BUG_ON'
     BUILD_BUG_ON(NF_CT_EXT_NUM > 9);
     ^~~~~~~~~~~~

vim +/__compiletime_assert_1859 +529 include/linux/compiler.h

9a8ab1c3 Daniel Santos  2013-02-21  523   *
9a8ab1c3 Daniel Santos  2013-02-21  524   * In tradition of POSIX assert, this macro will break the build if the
9a8ab1c3 Daniel Santos  2013-02-21  525   * supplied condition is *false*, emitting the supplied error message if the
9a8ab1c3 Daniel Santos  2013-02-21  526   * compiler has support to do so.
9a8ab1c3 Daniel Santos  2013-02-21  527   */
9a8ab1c3 Daniel Santos  2013-02-21  528  #define compiletime_assert(condition, msg) \
9a8ab1c3 Daniel Santos  2013-02-21 @529  	_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
9a8ab1c3 Daniel Santos  2013-02-21  530  
47933ad4 Peter Zijlstra 2013-11-06  531  #define compiletime_assert_atomic_type(t)				\
47933ad4 Peter Zijlstra 2013-11-06  532  	compiletime_assert(__native_word(t),				\

:::::: The code at line 529 was first introduced by commit
:::::: 9a8ab1c39970a4938a72d94e6fd13be88a797590 bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG

:::::: TO: Daniel Santos <daniel.santos@pobox.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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

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