[tglx-devel:timers/posix 54/61] arch/x86/kernel/signal_32.c:459:1: error: static assertion failed due to requirement 'sizeof ((((struct siginfo *)0)->_sifields._timer)) == 4 * sizeof(int)': sizeof_field(siginfo32_t, _sifields._timer) == 4*sizeof(int)

* [tglx-devel:timers/posix 54/61] arch/x86/kernel/signal_32.c:459:1: error: static assertion failed due to requirement 'sizeof ((((struct siginfo *)0)->_sifields._timer)) == 4 * sizeof(int)': sizeof_field(siginfo32_t, _sifields._timer) == 4*sizeof(int)
@ 2023-06-06  3:01 kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2023-06-06  3:01 UTC (permalink / raw)
  To: Thomas Gleixner; +Cc: llvm, oe-kbuild-all

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git timers/posix
head:   16a20adb1e0ae19ad42041a7d1b5583e4705ca0c
commit: 7980f85caabff6a355848d2d3cd50acbb38b44b3 [54/61] signal: Add sys_private_ptr to siginfo::timer
config: i386-randconfig-i062-20230605 (https://download.01.org/0day-ci/archive/20230606/202306061017.X48OHhzM-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git/commit/?id=7980f85caabff6a355848d2d3cd50acbb38b44b3
        git remote add tglx-devel https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git
        git fetch --no-tags tglx-devel timers/posix
        git checkout 7980f85caabff6a355848d2d3cd50acbb38b44b3
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/kernel/ kernel/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306061017.X48OHhzM-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/x86/kernel/signal_32.c:459:1: error: static assertion failed due to requirement 'sizeof ((((struct siginfo *)0)->_sifields._timer)) == 4 * sizeof(int)': sizeof_field(siginfo32_t, _sifields._timer) == 4*sizeof(int)
   CHECK_SI_SIZE  (_timer, 4*sizeof(int));
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/x86/kernel/signal_32.c:447:2: note: expanded from macro 'CHECK_SI_SIZE'
           static_assert(sizeof_field(siginfo32_t, _sifields.name) == size)
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:77:34: note: expanded from macro 'static_assert'
   #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:78:41: note: expanded from macro '__static_assert'
   #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
                                           ^              ~~~~
   1 error generated.

vim +459 arch/x86/kernel/signal_32.c

f6e2a56c2bad10 Brian Gerst 2022-12-19  453  
f6e2a56c2bad10 Brian Gerst 2022-12-19  454  CHECK_SI_OFFSET(_timer);
f6e2a56c2bad10 Brian Gerst 2022-12-19  455  #ifdef CONFIG_COMPAT
f6e2a56c2bad10 Brian Gerst 2022-12-19  456  /* compat_siginfo_t doesn't have si_sys_private */
f6e2a56c2bad10 Brian Gerst 2022-12-19  457  CHECK_SI_SIZE  (_timer, 3*sizeof(int));
f6e2a56c2bad10 Brian Gerst 2022-12-19  458  #else
f6e2a56c2bad10 Brian Gerst 2022-12-19 @459  CHECK_SI_SIZE  (_timer, 4*sizeof(int));
f6e2a56c2bad10 Brian Gerst 2022-12-19  460  #endif
f6e2a56c2bad10 Brian Gerst 2022-12-19  461  static_assert(offsetof(siginfo32_t, si_tid)     == 0x0C);
f6e2a56c2bad10 Brian Gerst 2022-12-19  462  static_assert(offsetof(siginfo32_t, si_overrun) == 0x10);
f6e2a56c2bad10 Brian Gerst 2022-12-19  463  static_assert(offsetof(siginfo32_t, si_value)   == 0x14);
f6e2a56c2bad10 Brian Gerst 2022-12-19  464  

:::::: The code at line 459 was first introduced by commit
:::::: f6e2a56c2bad10dd4381d5ab021332ef70d81990 x86/signal: Move siginfo field tests

:::::: TO: Brian Gerst <brgerst@gmail.com>
:::::: CC: Ingo Molnar <mingo@kernel.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

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