Hi Mike, I love your patch! Yet something to improve: [auto build test ERROR on soc/for-next] [also build test ERROR on linus/master v5.19-rc2 next-20220617] [cannot apply to arm64/for-next/core arm/for-next kvmarm/next xilinx-xlnx/master] [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/intel-lab-lkp/linux/commits/Mike-Kravetz/hugetlb-speed-up-linear-address-scanning/20220617-050726 base: https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next config: i386-debian-10.3 (https://download.01.org/0day-ci/archive/20220618/202206180021.rcc4B1by-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/4c647687607f10fece04967b8180c0dadaf765e6 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Mike-Kravetz/hugetlb-speed-up-linear-address-scanning/20220617-050726 git checkout 4c647687607f10fece04967b8180c0dadaf765e6 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): mm/hugetlb.c: In function 'hugetlb_mask_last_page': >> mm/hugetlb.c:6901:9: error: duplicate case value 6901 | case PUD_SIZE: | ^~~~ mm/hugetlb.c:6899:9: note: previously used here 6899 | case P4D_SIZE: | ^~~~ vim +6901 mm/hugetlb.c 6886 6887 /* 6888 * Return a mask that can be used to update an address to the last huge 6889 * page in a page table page mapping size. Used to skip non-present 6890 * page table entries when linearly scanning address ranges. Architectures 6891 * with unique huge page to page table relationships can define their own 6892 * version of this routine. 6893 */ 6894 unsigned long hugetlb_mask_last_page(struct hstate *h) 6895 { 6896 unsigned long hp_size = huge_page_size(h); 6897 6898 switch (hp_size) { 6899 case P4D_SIZE: 6900 return PGDIR_SIZE - P4D_SIZE; > 6901 case PUD_SIZE: 6902 return P4D_SIZE - PUD_SIZE; 6903 case PMD_SIZE: 6904 return PUD_SIZE - PMD_SIZE; 6905 default: 6906 break; /* Should never happen */ 6907 } 6908 6909 return ~(0UL); 6910 } 6911 -- 0-DAY CI Kernel Test Service https://01.org/lkp
