tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git rtmutex head: 464d92f29d4fc8581adb0dc25bb8c1d108452fa6 commit: 62ee7142ca57390ba70945e6180e05f4fb1fc73b [12/62] rtmutex: Split out the inner parts of struct rtmutex config: x86_64-randconfig-a003-20210727 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project c658b472f3e61e1818e1909bf02f3d65470018a5) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git/commit/?id=62ee7142ca57390ba70945e6180e05f4fb1fc73b git remote add tglx-devel https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git git fetch --no-tags tglx-devel rtmutex git checkout 62ee7142ca57390ba70945e6180e05f4fb1fc73b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All error/warnings (new ones prefixed by >>): >> kernel/locking/locktorture.c:468:8: error: implicit declaration of function '__RT_MUTEX_BASE_INITIALIZE' [-Werror,-Wimplicit-function-declaration] static DEFINE_RT_MUTEX(torture_rtmutex); ^ include/linux/rtmutex.h:81:30: note: expanded from macro 'DEFINE_RT_MUTEX' struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname) ^ include/linux/rtmutex.h:76:13: note: expanded from macro '__RT_MUTEX_INITIALIZER' .rtmutex = __RT_MUTEX_BASE_INITIALIZE(mutexname.rtmutex) \ ^ >> kernel/locking/locktorture.c:468:8: warning: suggest braces around initialization of subobject [-Wmissing-braces] static DEFINE_RT_MUTEX(torture_rtmutex); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rtmutex.h:81:30: note: expanded from macro 'DEFINE_RT_MUTEX' struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rtmutex.h:76:13: note: expanded from macro '__RT_MUTEX_INITIALIZER' .rtmutex = __RT_MUTEX_BASE_INITIALIZE(mutexname.rtmutex) \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> kernel/locking/locktorture.c:468:8: warning: suggest braces around initialization of subobject [-Wmissing-braces] static DEFINE_RT_MUTEX(torture_rtmutex); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rtmutex.h:81:30: note: expanded from macro 'DEFINE_RT_MUTEX' struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rtmutex.h:76:13: note: expanded from macro '__RT_MUTEX_INITIALIZER' .rtmutex = __RT_MUTEX_BASE_INITIALIZE(mutexname.rtmutex) \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> kernel/locking/locktorture.c:468:8: warning: suggest braces around initialization of subobject [-Wmissing-braces] static DEFINE_RT_MUTEX(torture_rtmutex); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rtmutex.h:81:30: note: expanded from macro 'DEFINE_RT_MUTEX' struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rtmutex.h:76:13: note: expanded from macro '__RT_MUTEX_INITIALIZER' .rtmutex = __RT_MUTEX_BASE_INITIALIZE(mutexname.rtmutex) \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> kernel/locking/locktorture.c:468:8: error: initializer element is not a compile-time constant static DEFINE_RT_MUTEX(torture_rtmutex); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rtmutex.h:81:30: note: expanded from macro 'DEFINE_RT_MUTEX' struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rtmutex.h:76:13: note: expanded from macro '__RT_MUTEX_INITIALIZER' .rtmutex = __RT_MUTEX_BASE_INITIALIZE(mutexname.rtmutex) \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 3 warnings and 2 errors generated. vim +/__RT_MUTEX_BASE_INITIALIZE +468 kernel/locking/locktorture.c 0186a6cbdc6287 Chris Wilson 2016-12-01 466 095777c417db14 Davidlohr Bueso 2015-07-22 467 #ifdef CONFIG_RT_MUTEXES 095777c417db14 Davidlohr Bueso 2015-07-22 @468 static DEFINE_RT_MUTEX(torture_rtmutex); 095777c417db14 Davidlohr Bueso 2015-07-22 469 :::::: The code at line 468 was first introduced by commit :::::: 095777c417db142970adeb776fa0cb10810b8122 locktorture: Support rtmutex torturing :::::: TO: Davidlohr Bueso :::::: CC: Paul E. McKenney --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org