Hi Michał,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.5-rc7 next-20230825] [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-i004-20230720 (https://download.01.org/0day-ci/archive/20230826/202308262125.VHTuZ7uV-lkp@i...) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce: (https://download.01.org/0day-ci/archive/20230826/202308262125.VHTuZ7uV-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/202308262125.VHTuZ7uV-lkp@intel.com/

All warnings (new ones prefixed by >>):

fs/proc/task_mmu.c: In function 'pagemap_scan_test_walk': fs/proc/task_mmu.c:1921:13: error: implicit declaration of function 'userfaultfd_wp_async'; did you mean 'userfaultfd_wp'? [-Werror=implicit-function-declaration] 1921 | if (userfaultfd_wp_async(vma) && userfaultfd_wp_use_markers(vma)) | ^~~~~~~~~~~~~~~~~~~~ | userfaultfd_wp fs/proc/task_mmu.c: In function 'pagemap_scan_init_bounce_buffer': fs/proc/task_mmu.c:2290:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 2290 | p->vec_out = (void __user *)p->arg.vec; | ^ fs/proc/task_mmu.c: At top level:

...

fs/proc/task_mmu.c:1967:13: warning: 'pagemap_scan_backout_range' defined but not used [-Wunused-function]

1967 | static void pagemap_scan_backout_range(struct pagemap_scan_private *p, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors

vim +/pagemap_scan_backout_range +1967 fs/proc/task_mmu.c

1966

1967 static void pagemap_scan_backout_range(struct pagemap_scan_private *p,

1968 unsigned long addr, unsigned long end) 1969 { 1970 struct page_region *cur_buf = &p->cur_buf; 1971 1972 if (cur_buf->start != addr) { 1973 cur_buf->end = addr; 1974 } else { 1975 cur_buf->start = cur_buf->end = 0; 1976 } 1977 1978 p->end_addr = 0; 1979 } 1980