tree: https://github.com/oracle/dtrace-linux-kernel v1/5.7 head: 55f507c4c80c4ed245c8a4ba2096d10b20bf7218 commit: 8954eec92287a17f78f87b2c77fa1775b065a48e [4/20] dtrace: core and x86 config: um-allmodconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout 8954eec92287a17f78f87b2c77fa1775b065a48e # save the attached .config to linux build tree make W=1 ARCH=um If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the oracle-dtrace-linux-kernel/v1/5.7 HEAD 55f507c4c80c4ed245c8a4ba2096d10b20bf7218 builds fine. It only hurts bisectibility. All error/warnings (new ones prefixed by >>, old ones prefixed by <<): arch/x86/um/user-offsets.c:18:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 18 | void foo(void) | ^~~ cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] In file included from include/linux/rhashtable-types.h:14, from include/linux/ipc.h:7, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/sched.h:15, from arch/x86/um/shared/sysdep/kernel-offsets.h:3, from arch/um/kernel/asm-offsets.c:1: include/linux/mutex.h: In function 'mutex_owned': 223 | return mutex_is_locked(lock) && __mutex_owner(lock) == current; | ^~~~~~~~~~~~~ | mutex_owned 223 | return mutex_is_locked(lock) && __mutex_owner(lock) == current; | ^~ In file included from include/linux/uaccess.h:11, from include/linux/crypto.h:21, from arch/x86/um/shared/sysdep/kernel-offsets.h:5, from arch/um/kernel/asm-offsets.c:1: arch/um/include/asm/uaccess.h: In function '__access_ok': arch/um/include/asm/uaccess.h:17:29: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] 17 | (((unsigned long) (addr) >= FIXADDR_USER_START) && | ^~ arch/um/include/asm/uaccess.h:45:3: note: in expansion of macro '__access_ok_vsyscall' 45 | __access_ok_vsyscall(addr, size) || | ^~~~~~~~~~~~~~~~~~~~ In file included from arch/um/kernel/asm-offsets.c:1: arch/x86/um/shared/sysdep/kernel-offsets.h: At top level: arch/x86/um/shared/sysdep/kernel-offsets.h:9:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 9 | void foo(void) | ^~~ cc1: some warnings being treated as errors make[2]: *** [scripts/Makefile.build:100: arch/um/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1149: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:180: sub-make] Error 2 vim +223 include/linux/mutex.h 219 220 #if defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_SMP) 221 static inline int mutex_owned(struct mutex *lock) 222 { 224 } 225 #else 226 static inline int mutex_owned(struct mutex *lock) 227 { 228 return mutex_is_locked(lock); 229 } 230 #endif 231 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org