Hi Jianqun, Thank you for the patch! Yet something to improve: [auto build test ERROR on hnaz-linux-mm/master] url: https://github.com/0day-ci/linux/commits/Jianqun-Xu/mm-slab-kmalloc-with-GFP_DMA32-allocate-from-SLAB_CACHE_DMA32/20210312-160426 base: https://github.com/hnaz/linux-mm master config: x86_64-randconfig-a006-20210312 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 7b153b43d3a14d76975039408c4b922beb576735) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/93abfa9fa97332c9d5c1727fcf76b604b6da33de git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jianqun-Xu/mm-slab-kmalloc-with-GFP_DMA32-allocate-from-SLAB_CACHE_DMA32/20210312-160426 git checkout 93abfa9fa97332c9d5c1727fcf76b604b6da33de # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): >> mm/slab_common.c:812:24: error: implicit declaration of function 'kmalloc_size' [-Werror,-Wimplicit-function-declaration] unsigned int size = kmalloc_size(i); ^ >> mm/slab_common.c:813:20: error: implicit declaration of function 'kmalloc_cache_name' [-Werror,-Wimplicit-function-declaration] const char *n = kmalloc_cache_name("dma32-kmalloc", size); ^ >> mm/slab_common.c:813:16: warning: incompatible integer to pointer conversion initializing 'const char *' with an expression of type 'int' [-Wint-conversion] const char *n = kmalloc_cache_name("dma32-kmalloc", size); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning and 2 errors generated. vim +/kmalloc_size +812 mm/slab_common.c 761 762 /* 763 * Create the kmalloc array. Some of the regular kmalloc arrays 764 * may already have been created because they were needed to 765 * enable allocations for slab creation. 766 */ 767 void __init create_kmalloc_caches(slab_flags_t flags) 768 { 769 int i; 770 enum kmalloc_cache_type type; 771 772 for (type = KMALLOC_NORMAL; type <= KMALLOC_RECLAIM; type++) { 773 for (i = KMALLOC_SHIFT_LOW; i <= KMALLOC_SHIFT_HIGH; i++) { 774 if (!kmalloc_caches[type][i]) 775 new_kmalloc_cache(i, type, flags); 776 777 /* 778 * Caches that are not of the two-to-the-power-of size. 779 * These have to be created immediately after the 780 * earlier power of two caches 781 */ 782 if (KMALLOC_MIN_SIZE <= 32 && i == 6 && 783 !kmalloc_caches[type][1]) 784 new_kmalloc_cache(1, type, flags); 785 if (KMALLOC_MIN_SIZE <= 64 && i == 7 && 786 !kmalloc_caches[type][2]) 787 new_kmalloc_cache(2, type, flags); 788 } 789 } 790 791 /* Kmalloc array is now usable */ 792 slab_state = UP; 793 794 #ifdef CONFIG_ZONE_DMA 795 for (i = 0; i <= KMALLOC_SHIFT_HIGH; i++) { 796 struct kmem_cache *s = kmalloc_caches[KMALLOC_NORMAL][i]; 797 798 if (s) { 799 kmalloc_caches[KMALLOC_DMA][i] = create_kmalloc_cache( 800 kmalloc_info[i].name[KMALLOC_DMA], 801 kmalloc_info[i].size, 802 SLAB_CACHE_DMA | flags, 0, 803 kmalloc_info[i].size); 804 } 805 } 806 #endif 807 #ifdef CONFIG_ZONE_DMA32 808 for (i = 0; i <= KMALLOC_SHIFT_HIGH; i++) { 809 struct kmem_cache *s = kmalloc_caches[KMALLOC_NORMAL][i]; 810 811 if (s) { > 812 unsigned int size = kmalloc_size(i); > 813 const char *n = kmalloc_cache_name("dma32-kmalloc", size); 814 815 BUG_ON(!n); 816 kmalloc_caches[KMALLOC_DMA32][i] = create_kmalloc_cache( 817 n, size, SLAB_CACHE_DMA32 | flags, 0, 0); 818 } 819 } 820 #endif 821 } 822 #endif /* !CONFIG_SLOB */ 823 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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