Hi Jiaxun, kernel test robot noticed the following build errors: [auto build test ERROR on 06f658aadff0e483ee4f807b0b46c9e5cba62bfa] url: https://github.com/intel-lab-lkp/linux/commits/Jiaxun-Yang/ptrace-Introduce-exception_ip-arch-hook/20240201-234906 base: 06f658aadff0e483ee4f807b0b46c9e5cba62bfa patch link: https://lore.kernel.org/r/20240201-exception_ip-v1-3-aa26ab3ee0b5%40flygoat.com patch subject: [PATCH 3/3] mm/memory: Use exception ip to search exception tables config: arm64-randconfig-001-20240203 (https://download.01.org/0day-ci/archive/20240203/202402032112.NBimLx5h-lkp@xxxxxxxxx/config) compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240203/202402032112.NBimLx5h-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/202402032112.NBimLx5h-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> mm/memory.c:5484:22: error: call to undeclared function 'exception_ip'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] unsigned long ip = exception_ip(regs); ^ mm/memory.c:5509:22: error: call to undeclared function 'exception_ip'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] unsigned long ip = exception_ip(regs); ^ 2 errors generated. vim +/exception_ip +5484 mm/memory.c 5477 5478 static inline bool get_mmap_lock_carefully(struct mm_struct *mm, struct pt_regs *regs) 5479 { 5480 if (likely(mmap_read_trylock(mm))) 5481 return true; 5482 5483 if (regs && !user_mode(regs)) { > 5484 unsigned long ip = exception_ip(regs); 5485 if (!search_exception_tables(ip)) 5486 return false; 5487 } 5488 5489 return !mmap_read_lock_killable(mm); 5490 } 5491 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
