tree: git://git.infradead.org/users/hch/misc.git flock-cleanup head: e9d60bd371bf49d645e69eacfebe50002b65e393 commit: b76dff6a170ce35993b64478fefc5b1226abafec [3/13] asm-generic: merge the 32-bit mips struct flock into the generic one config: mips-allyesconfig (attached as .config) compiler: mips-linux-gcc (GCC) 9.3.0 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 git checkout b76dff6a170ce35993b64478fefc5b1226abafec # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/mips/include/uapi/asm/fcntl.h:58, from include/uapi/linux/fcntl.h:5, from include/linux/fcntl.h:6, from include/linux/fs.h:26, from include/linux/compat.h:17, from arch/mips/kernel/asm-offsets.c:12: 199 | __kernel_pid_t l_pid; | ^~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:26:6: warning: no previous prototype for 'output_ptreg_defines' [-Wmissing-prototypes] 26 | void output_ptreg_defines(void) | ^~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:78:6: warning: no previous prototype for 'output_task_defines' [-Wmissing-prototypes] 78 | void output_task_defines(void) | ^~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:93:6: warning: no previous prototype for 'output_thread_info_defines' [-Wmissing-prototypes] 93 | void output_thread_info_defines(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:110:6: warning: no previous prototype for 'output_thread_defines' [-Wmissing-prototypes] 110 | void output_thread_defines(void) | ^~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:138:6: warning: no previous prototype for 'output_thread_fpu_defines' [-Wmissing-prototypes] 138 | void output_thread_fpu_defines(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:181:6: warning: no previous prototype for 'output_mm_defines' [-Wmissing-prototypes] 181 | void output_mm_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:220:6: warning: no previous prototype for 'output_sc_defines' [-Wmissing-prototypes] 220 | void output_sc_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:255:6: warning: no previous prototype for 'output_signal_defined' [-Wmissing-prototypes] 255 | void output_signal_defined(void) | ^~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:322:6: warning: no previous prototype for 'output_pbe_defines' [-Wmissing-prototypes] 322 | void output_pbe_defines(void) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:334:6: warning: no previous prototype for 'output_pm_defines' [-Wmissing-prototypes] 334 | void output_pm_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:348:6: warning: no previous prototype for 'output_kvm_defines' [-Wmissing-prototypes] 348 | void output_kvm_defines(void) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:392:6: warning: no previous prototype for 'output_cps_defines' [-Wmissing-prototypes] 392 | void output_cps_defines(void) | ^~~~~~~~~~~~~~~~~~ make[2]: *** [scripts/Makefile.build:114: arch/mips/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1175: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:185: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +199 include/uapi/asm-generic/fcntl.h 9317259ead88fe include/asm-generic/fcntl.h Stephen Rothwell 2005-09-06 190 5ac353f9baf716 include/asm-generic/fcntl.h Stephen Rothwell 2005-09-06 191 struct flock { 5ac353f9baf716 include/asm-generic/fcntl.h Stephen Rothwell 2005-09-06 192 short l_type; 5ac353f9baf716 include/asm-generic/fcntl.h Stephen Rothwell 2005-09-06 193 short l_whence; 85efde6f4e0de9 include/asm-generic/fcntl.h Arnd Bergmann 2009-02-26 194 __kernel_off_t l_start; 85efde6f4e0de9 include/asm-generic/fcntl.h Arnd Bergmann 2009-02-26 195 __kernel_off_t l_len; b76dff6a170ce3 include/uapi/asm-generic/fcntl.h Christoph Hellwig 2020-07-17 196 #ifdef __ARCH_FLOCK_EXTRA_SYSID b76dff6a170ce3 include/uapi/asm-generic/fcntl.h Christoph Hellwig 2020-07-17 197 __ARCH_FLOCK_EXTRA_SYSID b76dff6a170ce3 include/uapi/asm-generic/fcntl.h Christoph Hellwig 2020-07-17 198 #endif 85efde6f4e0de9 include/asm-generic/fcntl.h Arnd Bergmann 2009-02-26 @199 __kernel_pid_t l_pid; a4dd44e32fb689 include/uapi/asm-generic/fcntl.h Christoph Hellwig 2020-07-17 200 #ifdef __ARCH_FLOCK_PAD 5ac353f9baf716 include/asm-generic/fcntl.h Stephen Rothwell 2005-09-06 201 __ARCH_FLOCK_PAD 5ac353f9baf716 include/asm-generic/fcntl.h Stephen Rothwell 2005-09-06 202 #endif a4dd44e32fb689 include/uapi/asm-generic/fcntl.h Christoph Hellwig 2020-07-17 203 }; 8d286aa5eaf951 include/asm-generic/fcntl.h Stephen Rothwell 2005-09-06 204 :::::: The code at line 199 was first introduced by commit :::::: 85efde6f4e0de9577256c5f0030088d3fd4347c1 make exported headers use strict posix types :::::: TO: Arnd Bergmann <arnd(a)arndb.de&gt; :::::: CC: Ingo Molnar <mingo(a)elte.hu&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org