* [linux-next:master 11113/11713] 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')
@ 2022-03-09 16:30 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2022-03-09 16:30 UTC (permalink / raw)
To: Vijay Balakrishna
Cc: llvm, kbuild-all, Linux Memory Management List, Will Deacon,
Pasha Tatashin
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@intel.com/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@intel.com>
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@lists.01.org
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2022-03-09 16:30 [linux-next:master 11113/11713] 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') kernel test robot
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