tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git tif-task_work head: df10f6edc636642f9af3603a5161569ef342305d commit: df10f6edc636642f9af3603a5161569ef342305d [30/30] kernel: remove checking for TIF_NOTIFY_SIGNAL config: arc-randconfig-r001-20201012 (attached as .config) compiler: arc-elf-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 # https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/com... git remote add block https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git git fetch --no-tags block tif-task_work git checkout df10f6edc636642f9af3603a5161569ef342305d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 include/asm-generic/bug.h:5, from arch/arc/include/asm/bug.h:30, from include/linux/bug.h:5, from include/linux/thread_info.h:12, from include/asm-generic/current.h:5, from arch/arc/include/asm/current.h:20, from include/linux/sched.h:12, from arch/arc/kernel/asm-offsets.c:6: include/linux/sched/signal.h: In function 'signal_pending': 368 | if (unlikely(test_tsk_thread_flag(p, TIF_NOTIFY_SIGNAL))) | ^~~~~~~~~~~~~~~~~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/sched/signal.h:368:39: note: each undeclared identifier is reported only once for each function it appears in 368 | if (unlikely(test_tsk_thread_flag(p, TIF_NOTIFY_SIGNAL))) | ^~~~~~~~~~~~~~~~~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ make[2]: *** [scripts/Makefile.build:117: arch/arc/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1198: 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 +/TIF_NOTIFY_SIGNAL +368 include/linux/sched/signal.h 2a1f062a4acf0be Ingo Molnar 2017-02-02 360 488427a823feb1c Jens Axboe 2020-10-01 361 static inline int signal_pending(struct task_struct *p) 488427a823feb1c Jens Axboe 2020-10-01 362 { b6d5da9ba8e31f7 Jens Axboe 2020-10-03 363 /* b6d5da9ba8e31f7 Jens Axboe 2020-10-03 364 * TIF_NOTIFY_SIGNAL isn't really a signal, but it requires the same b6d5da9ba8e31f7 Jens Axboe 2020-10-03 365 * behavior in terms of ensuring that we break out of wait loops b6d5da9ba8e31f7 Jens Axboe 2020-10-03 366 * so that notify signal callbacks can be processed. b6d5da9ba8e31f7 Jens Axboe 2020-10-03 367 */ b6d5da9ba8e31f7 Jens Axboe 2020-10-03 @368 if (unlikely(test_tsk_thread_flag(p, TIF_NOTIFY_SIGNAL))) b6d5da9ba8e31f7 Jens Axboe 2020-10-03 369 return 1; 488427a823feb1c Jens Axboe 2020-10-01 370 return task_sigpending(p); 488427a823feb1c Jens Axboe 2020-10-01 371 } 488427a823feb1c Jens Axboe 2020-10-01 372 :::::: The code at line 368 was first introduced by commit :::::: b6d5da9ba8e31f7b222172c1626cfd0f5d035083 kernel: add support for TIF_NOTIFY_SIGNAL :::::: TO: Jens Axboe <axboe(a)kernel.dk&gt; :::::: CC: Jens Axboe <axboe(a)kernel.dk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org