Hi Masami, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on rostedt-trace/for-next] [also build test ERROR on bpf-next/master bpf/master linus/master v5.17-rc1 next-20220124] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/fprobe-Add-ftra... base: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20220125/202201250537.lwxse0qH-lk...) compiler: s390-linux-gcc (GCC) 11.2.0 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://github.com/0day-ci/linux/commit/c0e0471b58c3c9122bbff7523f97a3635... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Masami-Hiramatsu/fprobe-Add-ftrace-based-probe-APIs/20220112-000050 git checkout c0e0471b58c3c9122bbff7523f97a363558284eb # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=s390 SHELL=/bin/bash 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 >>): s390-linux-ld: kernel/dma/coherent.o: in function `dma_init_coherent_memory': coherent.c:(.text+0x13e): undefined reference to `memremap' s390-linux-ld: coherent.c:(.text+0x274): undefined reference to `memunmap' s390-linux-ld: kernel/dma/coherent.o: in function `dma_declare_coherent_memory': coherent.c:(.text+0x820): undefined reference to `memunmap' s390-linux-ld: kernel/trace/rethook.o: in function `__rethook_find_ret_addr': s390-linux-ld: kernel/trace/rethook.o: in function `rethook_hook_current': s390-linux-ld: kernel/trace/rethook.o: in function `rethook_trampoline_handler': rethook.c:(.text+0x1bb2): undefined reference to `arch_rethook_trampoline' s390-linux-ld: drivers/irqchip/irq-al-fic.o: in function `al_fic_init_dt': irq-al-fic.c:(.init.text+0x98): undefined reference to `of_iomap' s390-linux-ld: irq-al-fic.c:(.init.text+0x5a8): undefined reference to `iounmap' s390-linux-ld: drivers/clk/clk-fixed-mmio.o: in function `fixed_mmio_clk_setup': clk-fixed-mmio.c:(.text+0x9a): undefined reference to `of_iomap' s390-linux-ld: clk-fixed-mmio.c:(.text+0xe6): undefined reference to `iounmap' s390-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_init': timer-of.c:(.init.text+0x184): undefined reference to `of_iomap' s390-linux-ld: timer-of.c:(.init.text+0x9bc): undefined reference to `iounmap' s390-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_cleanup': timer-of.c:(.init.text+0xc46): undefined reference to `iounmap' s390-linux-ld: drivers/clocksource/timer-microchip-pit64b.o: in function `mchp_pit64b_dt_init_timer': timer-microchip-pit64b.c:(.init.text+0x8a8): undefined reference to `of_iomap' s390-linux-ld: timer-microchip-pit64b.c:(.init.text+0x1072): undefined reference to `iounmap' Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for RETHOOK Depends on HAVE_RETHOOK Selected by - FPROBES && FTRACE && FUNCTION_TRACER && DYNAMIC_FTRACE_WITH_REGS --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org