Hi Michał,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on linus/master v6.5-rc2 next-20230720] [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/Micha-Miros-aw/Re-fs-proc-tas... base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/a0b5c6776b2ed91f78a7575649f8b100e58bd3a9.168988107... patch subject: Re: fs/proc/task_mmu: Implement IOCTL for efficient page table scanning config: i386-randconfig-r022-20230720 (https://download.01.org/0day-ci/archive/20230721/202307211337.5dwCMeHb-lkp@i...) compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a) reproduce: (https://download.01.org/0day-ci/archive/20230721/202307211337.5dwCMeHb-lkp@i...)

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@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202307211337.5dwCMeHb-lkp@intel.com/

All errors (new ones prefixed by >>):

...

fs/proc/task_mmu.c:1921:6: error: call to undeclared function 'userfaultfd_wp_async'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]

if (userfaultfd_wp_async(vma) && userfaultfd_wp_use_markers(vma)) ^

...

fs/proc/task_mmu.c:2200:12: error: call to undeclared function 'uffd_wp_range'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]

int err = uffd_wp_range(vma, addr, end - addr, true); ^ 2 errors generated.

vim +/userfaultfd_wp_async +1921 fs/proc/task_mmu.c

1913 1914 static int pagemap_scan_test_walk(unsigned long start, unsigned long end, 1915 struct mm_walk *walk) 1916 { 1917 struct pagemap_scan_private *p = walk->private; 1918 struct vm_area_struct *vma = walk->vma; 1919 unsigned long vma_category = 0; 1920

1921 if (userfaultfd_wp_async(vma) && userfaultfd_wp_use_markers(vma))

1922 vma_category |= PAGE_IS_WPASYNC; 1923 else if (p->arg.flags & PM_SCAN_CHECK_WPASYNC) 1924 return -EPERM; 1925 1926 if (vma->vm_flags & VM_PFNMAP) 1927 return 1; 1928 1929 if (!pagemap_scan_is_interesting_vma(vma_category, p)) 1930 return 1; 1931 1932 p->cur_vma_category = vma_category; 1933 return 0; 1934 } 1935