tree: git://git.infradead.org/users/hch/misc.git swiotlb-init-cleanup head: f750d1f8e172aa6649e256f6aadefe27306599e2 commit: a0a4498af0ad453ae74f5152c8610c4a4b31fae5 [8/11] swiotlb: make the swiotlb_init interface more useful config: arm64-buildonly-randconfig-r002-20220217 (https://download.01.org/0day-ci/archive/20220217/202202171918.nKSLWkqr-lk...) compiler: aarch64-linux-gcc (GCC) 11.2.0 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 git remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc swiotlb-init-cleanup git checkout a0a4498af0ad453ae74f5152c8610c4a4b31fae5 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/arm64/mm/init.c: In function 'mem_init': 376 | swiotlb_init(max_pfn > PFN_DOWN(arm64_dma_phys_limit, SWIOTLB_VERBOSE); | ^ In file included from include/asm-generic/memory_model.h:5, from arch/arm64/include/asm/memory.h:367, from arch/arm64/include/asm/thread_info.h:17, from include/linux/thread_info.h:60, from arch/arm64/include/asm/preempt.h:5, from include/linux/preempt.h:78, from include/linux/spinlock.h:55, from include/linux/swap.h:5, from arch/arm64/mm/init.c:12: include/linux/pfn.h:20: note: macro "PFN_DOWN" defined here 20 | #define PFN_DOWN(x) ((x) >> PAGE_SHIFT) | 376 | swiotlb_init(max_pfn > PFN_DOWN(arm64_dma_phys_limit, SWIOTLB_VERBOSE); | ^~~~~~~~ arch/arm64/mm/init.c:376:32: note: each undeclared identifier is reported only once for each function it appears in 376 | swiotlb_init(max_pfn > PFN_DOWN(arm64_dma_phys_limit, SWIOTLB_VERBOSE); | ~ ^ ~ | ) 376 | swiotlb_init(max_pfn > PFN_DOWN(arm64_dma_phys_limit, SWIOTLB_VERBOSE); | ^~~~~~~~~~~~ In file included from include/linux/dma-direct.h:13, from arch/arm64/mm/init.c:23: include/linux/swiotlb.h:125:6: note: declared here 125 | void swiotlb_init(bool addressing_limited, unsigned int flags); | ^~~~~~~~~~~~ 403 | } | ^ | ; 404 | } | ~ vim +/PFN_DOWN +376 arch/arm64/mm/init.c 368 369 /* 370 * mem_init() marks the free areas in the mem_map and tells us how much memory 371 * is free. This is done after various parts of the system have claimed their 372 * memory after the kernel image. 373 */ 374 void __init mem_init(void) 375 { 377 378 /* this will put all unused low memory onto the freelists */ 379 memblock_free_all(); 380 381 /* 382 * Check boundaries twice: Some fundamental inconsistencies can be 383 * detected at build time already. 384 */ 385 #ifdef CONFIG_COMPAT 386 BUILD_BUG_ON(TASK_SIZE_32 > DEFAULT_MAP_WINDOW_64); 387 #endif 388 389 /* 390 * Selected page table levels should match when derived from 391 * scratch using the virtual address range and page size. 392 */ 393 BUILD_BUG_ON(ARM64_HW_PGTABLE_LEVELS(CONFIG_ARM64_VA_BITS) != 394 CONFIG_PGTABLE_LEVELS); 395 396 if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) { 397 extern int sysctl_overcommit_memory; 398 /* 399 * On a machine this small we won't get anywhere without 400 * overcommit, so turn it on by default. 401 */ 402 sysctl_overcommit_memory = OVERCOMMIT_ALWAYS; 404 } 405 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org