tree: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/kspp head: 420d688ff2971effafecef9d57af4854dd4d8618 commit: 0fc9374deb676160f02b41b456001cdc86a153e9 [13/28] compiler_types.h: Remove __compiletime_object_size() config: um-x86_64_defconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?id... git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git git fetch --no-tags kees for-next/kspp git checkout 0fc9374deb676160f02b41b456001cdc86a153e9 # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=um SUBARCH=x86_64 prepare If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | -- In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | In file included from arch/um/kernel/asm-offsets.c:1: arch/x86/um/shared/sysdep/kernel-offsets.h:9:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 9 | void foo(void) | ^~~ -- arch/x86/um/user-offsets.c:18:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 18 | void foo(void) | ^~~ arch/x86/um/Makefile:44: FORCE prerequisite is missing In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | In file included from arch/um/kernel/asm-offsets.c:1: arch/x86/um/shared/sysdep/kernel-offsets.h:9:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 9 | void foo(void) | ^~~ In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | -- arch/x86/um/user-offsets.c:18:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 18 | void foo(void) | ^~~ arch/x86/um/Makefile:44: FORCE prerequisite is missing In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | In file included from arch/um/kernel/asm-offsets.c:1: arch/x86/um/shared/sysdep/kernel-offsets.h:9:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 9 | void foo(void) | ^~~ In file included from include/linux/compiler_types.h:85, from <command-line>: 44 | #define __compiletime_warning(message) __attribute__((__warning__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:297: note: this is the location of the previous definition 297 | # define __compiletime_warning(msg) __attribute__((__warning__(msg))) | In file included from include/linux/compiler_types.h:85, from <command-line>: 45 | #define __compiletime_error(message) __attribute__((__error__(message))) | In file included from include/linux/compiler_types.h:65, from <command-line>: include/linux/compiler_attributes.h:125: note: this is the location of the previous definition 125 | # define __compiletime_error(msg) __attribute__((__error__(msg))) | vim +/__compiletime_warning +44 include/linux/compiler-gcc.h 43 46 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org