Hi Mikko,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc3 next-20160822]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]

url:    https://github.com/0day-ci/linux/commits/Mikko-Rapeli/Userspace-compile-test-and-fixes-for-exported-uapi-header-files/20160823-034928
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

Note: the linux-review/Mikko-Rapeli/Userspace-compile-test-and-fixes-for-exported-uapi-header-files/20160823-034928 HEAD ab90ab906304d4f306e440f4dbfa334720093b4f builds fine.
      It only hurts bisectibility.

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

   In file included from ./usr/include/linux/errqueue.h:5:0,
                    from Documentation/networking/timestamping/timestamping.c:46:
>> ./usr/include/linux/time.h:9:8: error: redefinition of 'struct timespec'
    struct timespec {
           ^~~~~~~~
   In file included from /usr/include/x86_64-linux-gnu/sys/select.h:43:0,
                    from /usr/include/x86_64-linux-gnu/sys/types.h:219,
                    from /usr/include/stdlib.h:314,
                    from Documentation/networking/timestamping/timestamping.c:33:
   /usr/include/time.h:120:8: note: originally defined here
    struct timespec
           ^~~~~~~~
   In file included from ./usr/include/linux/errqueue.h:5:0,
                    from Documentation/networking/timestamping/timestamping.c:46:
>> ./usr/include/linux/time.h:15:8: error: redefinition of 'struct timeval'
    struct timeval {
           ^~~~~~~
   In file included from /usr/include/x86_64-linux-gnu/sys/select.h:45:0,
                    from /usr/include/x86_64-linux-gnu/sys/types.h:219,
                    from /usr/include/stdlib.h:314,
                    from Documentation/networking/timestamping/timestamping.c:33:
   /usr/include/x86_64-linux-gnu/bits/time.h:30:8: note: originally defined here
    struct timeval
           ^~~~~~~
   In file included from ./usr/include/linux/errqueue.h:5:0,
                    from Documentation/networking/timestamping/timestamping.c:46:
>> ./usr/include/linux/time.h:20:8: error: redefinition of 'struct timezone'
    struct timezone {
           ^~~~~~~~
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:55:8: note: originally defined here
    struct timezone
           ^~~~~~~~
   In file included from ./usr/include/linux/errqueue.h:5:0,
                    from Documentation/networking/timestamping/timestamping.c:46:
>> ./usr/include/linux/time.h:30:0: warning: "ITIMER_REAL" redefined
    #define ITIMER_REAL  0
    
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:95:0: note: this is the location of the previous definition
    #define ITIMER_REAL ITIMER_REAL
    
   In file included from ./usr/include/linux/errqueue.h:5:0,
                    from Documentation/networking/timestamping/timestamping.c:46:
>> ./usr/include/linux/time.h:31:0: warning: "ITIMER_VIRTUAL" redefined
    #define ITIMER_VIRTUAL  1
    
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:98:0: note: this is the location of the previous definition
    #define ITIMER_VIRTUAL ITIMER_VIRTUAL
    
   In file included from ./usr/include/linux/errqueue.h:5:0,
                    from Documentation/networking/timestamping/timestamping.c:46:
>> ./usr/include/linux/time.h:32:0: warning: "ITIMER_PROF" redefined
    #define ITIMER_PROF  2
    
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:102:0: note: this is the location of the previous definition
    #define ITIMER_PROF ITIMER_PROF
    
   In file included from ./usr/include/linux/errqueue.h:5:0,
                    from Documentation/networking/timestamping/timestamping.c:46:
>> ./usr/include/linux/time.h:39:8: error: redefinition of 'struct itimerval'
    struct itimerval {
           ^~~~~~~~~
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:107:8: note: originally defined here
    struct itimerval
           ^~~~~~~~~
   Documentation/networking/timestamping/timestamping.c: In function 'sendpacket':
>> Documentation/networking/timestamping/timestamping.c:144:15: warning: passing argument 1 of 'gettimeofday' from incompatible pointer type [-Wincompatible-pointer-types]
     gettimeofday(&now, 0);
                  ^
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:71:12: note: expected 'struct timeval * __restrict__' but argument is of type 'struct timeval *'
    extern int gettimeofday (struct timeval *__restrict __tv,
               ^~~~~~~~~~~~
   Documentation/networking/timestamping/timestamping.c: In function 'printpacket':
   Documentation/networking/timestamping/timestamping.c:164:15: warning: passing argument 1 of 'gettimeofday' from incompatible pointer type [-Wincompatible-pointer-types]
     gettimeofday(&now, 0);
                  ^
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:71:12: note: expected 'struct timeval * __restrict__' but argument is of type 'struct timeval *'
    extern int gettimeofday (struct timeval *__restrict __tv,
               ^~~~~~~~~~~~
   Documentation/networking/timestamping/timestamping.c: In function 'main':
   Documentation/networking/timestamping/timestamping.c:474:15: warning: passing argument 1 of 'gettimeofday' from incompatible pointer type [-Wincompatible-pointer-types]
     gettimeofday(&next, 0);
                  ^
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:71:12: note: expected 'struct timeval * __restrict__' but argument is of type 'struct timeval *'
    extern int gettimeofday (struct timeval *__restrict __tv,
               ^~~~~~~~~~~~
   Documentation/networking/timestamping/timestamping.c:484:16: warning: passing argument 1 of 'gettimeofday' from incompatible pointer type [-Wincompatible-pointer-types]
      gettimeofday(&now, 0);
                   ^
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:71:12: note: expected 'struct timeval * __restrict__' but argument is of type 'struct timeval *'
    extern int gettimeofday (struct timeval *__restrict __tv,
               ^~~~~~~~~~~~
>> Documentation/networking/timestamping/timestamping.c:499:49: warning: passing argument 5 of 'select' from incompatible pointer type [-Wincompatible-pointer-types]
       res = select(sock + 1, &readfs, 0, &errorfs, &delta);
                                                    ^
   In file included from /usr/include/x86_64-linux-gnu/sys/types.h:219:0,
                    from /usr/include/stdlib.h:314,
                    from Documentation/networking/timestamping/timestamping.c:33:
   /usr/include/x86_64-linux-gnu/sys/select.h:106:12: note: expected 'struct timeval * __restrict__' but argument is of type 'struct timeval *'
    extern int select (int __nfds, fd_set *__restrict __readfds,
               ^~~~~~
   Documentation/networking/timestamping/timestamping.c:500:17: warning: passing argument 1 of 'gettimeofday' from incompatible pointer type [-Wincompatible-pointer-types]
       gettimeofday(&now, 0);
                    ^
   In file included from Documentation/networking/timestamping/timestamping.c:37:0:
   /usr/include/x86_64-linux-gnu/sys/time.h:71:12: note: expected 'struct timeval * __restrict__' but argument is of type 'struct timeval *'
    extern int gettimeofday (struct timeval *__restrict __tv,
               ^~~~~~~~~~~~

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