tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git randconfig-20200504 head: 5867adb94a59773ef2e3262b70538803fe896906 commit: c0d4007762ea821f644e7c87e338a5d3bb24b896 [199/355] y2038: move ns_to_old_timeval32 definition config: i386-tinyconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: git checkout c0d4007762ea821f644e7c87e338a5d3bb24b896 # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; Note: the arnd-playground/randconfig-20200504 HEAD 5867adb94a59773ef2e3262b70538803fe896906 builds fine. It only hurts bisectibility. All error/warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/time.h:74:0, from include/linux/ktime.h:24, from include/linux/timer.h:6, from include/linux/workqueue.h:9, from include/linux/mm_types.h:16, from include/linux/mmzone.h:21, from include/linux/gfp.h:6, from include/linux/slab.h:15, from include/linux/crypto.h:19, from arch/x86/kernel/asm-offsets.c:9: include/linux/time32.h: In function 'ns_to_old_timeval32': tv = ns_to_kernel_old_timeval(nsec); ^~~~~~~~~~~~~~~~~~~~~~~~ ns_to_old_timeval32 tv = ns_to_kernel_old_timeval(nsec); ^ In file included from include/linux/ktime.h:24:0, from include/linux/timer.h:6, from include/linux/workqueue.h:9, from include/linux/mm_types.h:16, from include/linux/mmzone.h:21, from include/linux/gfp.h:6, from include/linux/slab.h:15, from include/linux/crypto.h:19, from arch/x86/kernel/asm-offsets.c:9: include/linux/time.h: At top level: extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec); ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/time.h:74:0, from include/linux/ktime.h:24, from include/linux/timer.h:6, from include/linux/workqueue.h:9, from include/linux/mm_types.h:16, from include/linux/mmzone.h:21, from include/linux/gfp.h:6, from include/linux/slab.h:15, from include/linux/crypto.h:19, from arch/x86/kernel/asm-offsets.c:9: include/linux/time32.h:75:7: note: previous implicit declaration of 'ns_to_kernel_old_timeval' was here tv = ns_to_kernel_old_timeval(nsec); ^~~~~~~~~~~~~~~~~~~~~~~~ make[2]: *** [scripts/Makefile.build:106: arch/x86/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1121: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:180: sub-make] Error 2 vim +75 include/linux/time32.h 63 64 /** 65 * ns_to_old_timeval32 - Compat version of ns_to_timeval 66 * @nsec: the nanoseconds value to be converted 67 * 68 * Returns the old_timeval32 representation of the nsec parameter. 69 */ 70 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 71 { 72 struct __kernel_old_timeval tv; 73 struct old_timeval32 ctv; 74 76 ctv.tv_sec = tv.tv_sec; 77 ctv.tv_usec = tv.tv_usec; 78 79 return ctv; 80 } 81 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org