Hi Samuel, kernel test robot noticed the following build errors: [auto build test ERROR on linus/master] [also build test ERROR on v6.6-rc1 next-20230911] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Samuel-Holland/riscv-Apply-SiFive-CIP-1200-workaround-to-single-ASID-sfence-vma/20230910-042028 base: linus/master patch link: https://lore.kernel.org/r/20230909201727.10909-8-samuel%40sholland.org patch subject: [PATCH 7/7] riscv: mm: Combine the SMP and non-SMP TLB flushing code config: riscv-nommu_k210_sdcard_defconfig (https://download.01.org/0day-ci/archive/20230912/202309120901.kQtGm3L4-lkp@xxxxxxxxx/config) compiler: riscv64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230912/202309120901.kQtGm3L4-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202309120901.kQtGm3L4-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from arch/riscv/include/asm/pgtable.h:117, from include/linux/pgtable.h:6, from include/linux/mm.h:29, from arch/riscv/kernel/asm-offsets.c:10: arch/riscv/include/asm/tlbflush.h: In function 'flush_tlb_kernel_range': >> arch/riscv/include/asm/tlbflush.h:60:9: error: implicit declaration of function 'flush_tlb_all' [-Werror=implicit-function-declaration] 60 | flush_tlb_all(); | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors make[3]: *** [scripts/Makefile.build:116: arch/riscv/kernel/asm-offsets.s] Error 1 make[3]: Target 'prepare' not remade because of errors. make[2]: *** [Makefile:1202: prepare0] Error 2 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:234: __sub-make] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:234: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +/flush_tlb_all +60 arch/riscv/include/asm/tlbflush.h fab957c11efe2f Palmer Dabbelt 2017-07-10 55 fab957c11efe2f Palmer Dabbelt 2017-07-10 56 /* Flush a range of kernel pages */ fab957c11efe2f Palmer Dabbelt 2017-07-10 57 static inline void flush_tlb_kernel_range(unsigned long start, fab957c11efe2f Palmer Dabbelt 2017-07-10 58 unsigned long end) fab957c11efe2f Palmer Dabbelt 2017-07-10 59 { fab957c11efe2f Palmer Dabbelt 2017-07-10 @60 flush_tlb_all(); fab957c11efe2f Palmer Dabbelt 2017-07-10 61 } fab957c11efe2f Palmer Dabbelt 2017-07-10 62 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki