Hi Anshuman, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on v5.8-rc3] [also build test WARNING on next-20200629] [cannot apply to arm64/for-next/core] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Anshuman-Khandual/arm64-hugetlb-Reserve-CMA-areas-for-gigantic-pages-on-16K-and-64K-configs/20200629-144736 base: 9ebcfadb0610322ac537dd7aa5d9cbc2b2894c68 config: arm64-defconfig (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/arm64/mm/hugetlbpage.c:40:13: warning: no previous prototype for 'arm64_hugetlb_cma_reserve' [-Wmissing-prototypes] 40 | void __init arm64_hugetlb_cma_reserve(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~ vim +/arm64_hugetlb_cma_reserve +40 arch/arm64/mm/hugetlbpage.c 21 22 /* 23 * HugeTLB Support Matrix 24 * 25 * --------------------------------------------------- 26 * | Page Size | CONT PTE | PMD | CONT PMD | PUD | 27 * --------------------------------------------------- 28 * | 4K | 64K | 2M | 32M | 1G | 29 * | 16K | 2M | 32M | 1G | | 30 * | 64K | 2M | 512M | 16G | | 31 * --------------------------------------------------- 32 */ 33 34 /* 35 * Reserve CMA areas for the largest supported gigantic 36 * huge page when requested. Any other smaller gigantic 37 * huge pages could still be served from those areas. 38 */ 39 #ifdef CONFIG_CMA > 40 void __init arm64_hugetlb_cma_reserve(void) 41 { 42 int order; 43 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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