Hi Suren, I love your patch! Perhaps something to improve: [auto build test WARNING on arm64/for-next/core] [also build test WARNING on tip/x86/asm linus/master v5.13-rc7] [cannot apply to hnaz-linux-mm/master next-20210623] [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/Suren-Baghdasaryan/mm-introduce-... base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core config: arm64-randconfig-r006-20210622 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 7c8a507272587f181ec29401453949ebcd8fec65) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/64bd00602e706bc1b2e2267ca1434646c... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Suren-Baghdasaryan/mm-introduce-process_reap-system-call/20210624-032923 git checkout 64bd00602e706bc1b2e2267ca1434646c0900fa1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:152:1: note: expanded from here __arm64_sys_msync ^ kernel/sys_ni.c:284:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:285:1: warning: no previous prototype for function '__arm64_sys_mlock' [-Wmissing-prototypes] COND_SYSCALL(mlock); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:153:1: note: expanded from here __arm64_sys_mlock ^ kernel/sys_ni.c:285:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:286:1: warning: no previous prototype for function '__arm64_sys_munlock' [-Wmissing-prototypes] COND_SYSCALL(munlock); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:154:1: note: expanded from here __arm64_sys_munlock ^ kernel/sys_ni.c:286:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:287:1: warning: no previous prototype for function '__arm64_sys_mlockall' [-Wmissing-prototypes] COND_SYSCALL(mlockall); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:155:1: note: expanded from here __arm64_sys_mlockall ^ kernel/sys_ni.c:287:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:288:1: warning: no previous prototype for function '__arm64_sys_munlockall' [-Wmissing-prototypes] COND_SYSCALL(munlockall); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:156:1: note: expanded from here __arm64_sys_munlockall ^ kernel/sys_ni.c:288:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:289:1: warning: no previous prototype for function '__arm64_sys_mincore' [-Wmissing-prototypes] COND_SYSCALL(mincore); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:157:1: note: expanded from here __arm64_sys_mincore ^ kernel/sys_ni.c:289:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:290:1: warning: no previous prototype for function '__arm64_sys_madvise' [-Wmissing-prototypes] COND_SYSCALL(madvise); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:158:1: note: expanded from here __arm64_sys_madvise ^ kernel/sys_ni.c:290:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:291:1: warning: no previous prototype for function '__arm64_sys_process_madvise' [-Wmissing-prototypes] COND_SYSCALL(process_madvise); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:159:1: note: expanded from here __arm64_sys_process_madvise ^ kernel/sys_ni.c:291:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ COND_SYSCALL(process_reap); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:160:1: note: expanded from here __arm64_sys_process_reap ^ kernel/sys_ni.c:292:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:293:1: warning: no previous prototype for function '__arm64_sys_remap_file_pages' [-Wmissing-prototypes] COND_SYSCALL(remap_file_pages); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:161:1: note: expanded from here __arm64_sys_remap_file_pages ^ kernel/sys_ni.c:293:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:294:1: warning: no previous prototype for function '__arm64_sys_mbind' [-Wmissing-prototypes] COND_SYSCALL(mbind); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:162:1: note: expanded from here __arm64_sys_mbind ^ kernel/sys_ni.c:294:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:295:1: warning: no previous prototype for function '__arm64_compat_sys_mbind' [-Wmissing-prototypes] COND_SYSCALL_COMPAT(mbind); ^ arch/arm64/include/asm/syscall_wrapper.h:41:25: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:163:1: note: expanded from here __arm64_compat_sys_mbind ^ kernel/sys_ni.c:295:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:41:13: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:296:1: warning: no previous prototype for function '__arm64_sys_get_mempolicy' [-Wmissing-prototypes] COND_SYSCALL(get_mempolicy); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:164:1: note: expanded from here __arm64_sys_get_mempolicy ^ kernel/sys_ni.c:296:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:297:1: warning: no previous prototype for function '__arm64_compat_sys_get_mempolicy' [-Wmissing-prototypes] COND_SYSCALL_COMPAT(get_mempolicy); ^ arch/arm64/include/asm/syscall_wrapper.h:41:25: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:165:1: note: expanded from here __arm64_compat_sys_get_mempolicy ^ kernel/sys_ni.c:297:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:41:13: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:298:1: warning: no previous prototype for function '__arm64_sys_set_mempolicy' [-Wmissing-prototypes] COND_SYSCALL(set_mempolicy); ^ arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:166:1: note: expanded from here __arm64_sys_set_mempolicy ^ kernel/sys_ni.c:298:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL' asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \ ^ kernel/sys_ni.c:299:1: warning: no previous prototype for function '__arm64_compat_sys_set_mempolicy' [-Wmissing-prototypes] COND_SYSCALL_COMPAT(set_mempolicy); ^ arch/arm64/include/asm/syscall_wrapper.h:41:25: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs) \ ^ <scratch space>:167:1: note: expanded from here __arm64_compat_sys_set_mempolicy ^ kernel/sys_ni.c:299:1: note: declare 'static' if the function is not intended to be used outside of this translation unit vim +/__arm64_sys_process_reap +292 kernel/sys_ni.c 279 280 /* mm/, CONFIG_MMU only */ 281 COND_SYSCALL(swapon); 282 COND_SYSCALL(swapoff); 283 COND_SYSCALL(mprotect); 284 COND_SYSCALL(msync); 285 COND_SYSCALL(mlock); 286 COND_SYSCALL(munlock); 287 COND_SYSCALL(mlockall); 288 COND_SYSCALL(munlockall); 289 COND_SYSCALL(mincore); 290 COND_SYSCALL(madvise); 291 COND_SYSCALL(process_madvise); 293 COND_SYSCALL(remap_file_pages); 294 COND_SYSCALL(mbind); 295 COND_SYSCALL_COMPAT(mbind); 296 COND_SYSCALL(get_mempolicy); 297 COND_SYSCALL_COMPAT(get_mempolicy); 298 COND_SYSCALL(set_mempolicy); 299 COND_SYSCALL_COMPAT(set_mempolicy); 300 COND_SYSCALL(migrate_pages); 301 COND_SYSCALL_COMPAT(migrate_pages); 302 COND_SYSCALL(move_pages); 303 COND_SYSCALL_COMPAT(move_pages); 304 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org