Hi Muhammad, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on shuah-kselftest/next] [also build test WARNING on shuah-kselftest/fixes linus/master v6.2-rc5 next-20230124] [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/Muhammad-Usama-Anjum/userfaultfd-Add-UFFD-WP-Async-support/20230124-164601 base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next patch link: https://lore.kernel.org/r/20230124084323.1363825-2-usama.anjum%40collabora.com patch subject: [PATCH v8 1/4] userfaultfd: Add UFFD WP Async support config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20230124/202301241800.pdnow11d-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/59e98aec663b7ca8fd5f3b3d2a0f17f777f425c4 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Muhammad-Usama-Anjum/userfaultfd-Add-UFFD-WP-Async-support/20230124-164601 git checkout 59e98aec663b7ca8fd5f3b3d2a0f17f777f425c4 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=um SUBARCH=i386 olddefconfig make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from include/linux/mm_inline.h:9, from kernel/fork.c:46: >> include/linux/userfaultfd_k.h:278:5: warning: no previous prototype for 'userfaultfd_wp_async' [-Wmissing-prototypes] 278 | int userfaultfd_wp_async(struct vm_area_struct *vma) | ^~~~~~~~~~~~~~~~~~~~ kernel/fork.c:162:13: warning: no previous prototype for 'arch_release_task_struct' [-Wmissing-prototypes] 162 | void __weak arch_release_task_struct(struct task_struct *tsk) | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/fork.c:862:20: warning: no previous prototype for 'arch_task_cache_init' [-Wmissing-prototypes] 862 | void __init __weak arch_task_cache_init(void) { } | ^~~~~~~~~~~~~~~~~~~~ kernel/fork.c:957:12: warning: no previous prototype for 'arch_dup_task_struct' [-Wmissing-prototypes] 957 | int __weak arch_dup_task_struct(struct task_struct *dst, | ^~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/hugetlb.h:14, from kernel/sysctl.c:46: >> include/linux/userfaultfd_k.h:278:5: warning: no previous prototype for 'userfaultfd_wp_async' [-Wmissing-prototypes] 278 | int userfaultfd_wp_async(struct vm_area_struct *vma) | ^~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/mm_inline.h:9, from mm/memory.c:44: >> include/linux/userfaultfd_k.h:278:5: warning: no previous prototype for 'userfaultfd_wp_async' [-Wmissing-prototypes] 278 | int userfaultfd_wp_async(struct vm_area_struct *vma) | ^~~~~~~~~~~~~~~~~~~~ mm/memory.c: In function 'wp_huge_pmd': mm/memory.c:4824:33: error: implicit declaration of function 'set_pmd_at'; did you mean 'set_pte_at'? [-Werror=implicit-function-declaration] 4824 | set_pmd_at(vmf->vma->vm_mm, vmf->address, vmf->pmd, | ^~~~~~~~~~ | set_pte_at cc1: some warnings being treated as errors -- In file included from include/linux/hugetlb.h:14, from fs/proc/meminfo.c:6: >> include/linux/userfaultfd_k.h:278:5: warning: no previous prototype for 'userfaultfd_wp_async' [-Wmissing-prototypes] 278 | int userfaultfd_wp_async(struct vm_area_struct *vma) | ^~~~~~~~~~~~~~~~~~~~ fs/proc/meminfo.c:22:28: warning: no previous prototype for 'arch_report_meminfo' [-Wmissing-prototypes] 22 | void __attribute__((weak)) arch_report_meminfo(struct seq_file *m) | ^~~~~~~~~~~~~~~~~~~ vim +/userfaultfd_wp_async +278 include/linux/userfaultfd_k.h 277 > 278 int userfaultfd_wp_async(struct vm_area_struct *vma) 279 { 280 return false; 281 } 282 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
