tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 4e7a74a6856f8613dab9794da4b5cfb8fd54fb8c commit: 031495635b4668f94e964e037ca93d0d38bfde58 [11113/11713] arm64: Do not defer reserve_crashkernel() for platforms with no DMA memory zones config: arm64-randconfig-r012-20220309 (https://download.01.org/0day-ci/archive/20220310/202203100052.aZByW83b-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 276ca87382b8f16a65bddac700202924228982f6) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=031495635b4668f94e964e037ca93d0d38bfde58 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 031495635b4668f94e964e037ca93d0d38bfde58 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/mm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> arch/arm64/mm/init.c:90:19: error: redefinition of 'arm64_dma_phys_limit' with a different type: 'const phys_addr_t' (aka 'const unsigned long long') vs 'phys_addr_t' (aka 'unsigned long long') const phys_addr_t arm64_dma_phys_limit = PHYS_MASK + 1; ^ arch/arm64/include/asm/processor.h:102:20: note: previous declaration is here extern phys_addr_t arm64_dma_phys_limit; ^ 1 error generated. vim +90 arch/arm64/mm/init.c 57 58 /* 59 * If the corresponding config options are enabled, we create both ZONE_DMA 60 * and ZONE_DMA32. By default ZONE_DMA covers the 32-bit addressable memory 61 * unless restricted on specific platforms (e.g. 30-bit on Raspberry Pi 4). 62 * In such case, ZONE_DMA32 covers the rest of the 32-bit addressable memory, 63 * otherwise it is empty. 64 * 65 * Memory reservation for crash kernel either done early or deferred 66 * depending on DMA memory zones configs (ZONE_DMA) -- 67 * 68 * In absence of ZONE_DMA configs arm64_dma_phys_limit initialized 69 * here instead of max_zone_phys(). This lets early reservation of 70 * crash kernel memory which has a dependency on arm64_dma_phys_limit. 71 * Reserving memory early for crash kernel allows linear creation of block 72 * mappings (greater than page-granularity) for all the memory bank rangs. 73 * In this scheme a comparatively quicker boot is observed. 74 * 75 * If ZONE_DMA configs are defined, crash kernel memory reservation 76 * is delayed until DMA zone memory range size initilazation performed in 77 * zone_sizes_init(). The defer is necessary to steer clear of DMA zone 78 * memory range to avoid overlap allocation. So crash kernel memory boundaries 79 * are not known when mapping all bank memory ranges, which otherwise means 80 * not possible to exclude crash kernel range from creating block mappings 81 * so page-granularity mappings are created for the entire memory range. 82 * Hence a slightly slower boot is observed. 83 * 84 * Note: Page-granularity mapppings are necessary for crash kernel memory 85 * range for shrinking its size via /sys/kernel/kexec_crash_size interface. 86 */ 87 #if IS_ENABLED(CONFIG_ZONE_DMA) || IS_ENABLED(CONFIG_ZONE_DMA32) 88 phys_addr_t __ro_after_init arm64_dma_phys_limit; 89 #else > 90 const phys_addr_t arm64_dma_phys_limit = PHYS_MASK + 1; 91 #endif 92 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
