tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 98546348153dee5f8ced572fd6c4690461d20f51 commit: 342ec54e2df2b6944c883e078cfae855cc33cc31 [3616/3917] mm: hugetlb: free the vmemmap pages associated with each HugeTLB page config: arm64-randconfig-r001-20210311 (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 # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=342ec54e2df2b6944c883e078cfae855cc33cc31 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 342ec54e2df2b6944c883e078cfae855cc33cc31 # 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 >>): In file included from arch/arm64/include/asm/memory.h:366, from arch/arm64/include/asm/thread_info.h:17, from include/linux/thread_info.h:58, from arch/arm64/include/asm/preempt.h:5, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/mmzone.h:8, from include/linux/gfp.h:6, from include/linux/mm.h:10, from mm/sparse-vmemmap.c:21: mm/sparse-vmemmap.c: In function 'vmemmap_pte_range': >> mm/sparse-vmemmap.c:69:35: warning: operation on 'pte' may be undefined [-Wsequence-point] 69 | walk->reuse_page = pte_page(*pte++); | ~~~^~ include/asm-generic/memory_model.h:54:40: note: in definition of macro '__pfn_to_page' 54 | #define __pfn_to_page(pfn) (vmemmap + (pfn)) | ^~~ arch/arm64/include/asm/pgtable.h:73:4: note: in expansion of macro 'pte_val' 73 | ((pte_val(pte) & PTE_ADDR_LOW) | ((pte_val(pte) & PTE_ADDR_HIGH) << 36)) | ^~~~~~~ arch/arm64/include/asm/pgtable.h:80:24: note: in expansion of macro '__pte_to_phys' 80 | #define pte_pfn(pte) (__pte_to_phys(pte) >> PAGE_SHIFT) | ^~~~~~~~~~~~~ arch/arm64/include/asm/pgtable.h:86:37: note: in expansion of macro 'pte_pfn' 86 | #define pte_page(pte) (pfn_to_page(pte_pfn(pte))) | ^~~~~~~ mm/sparse-vmemmap.c:69:22: note: in expansion of macro 'pte_page' 69 | walk->reuse_page = pte_page(*pte++); | ^~~~~~~~ vim +/pte +69 mm/sparse-vmemmap.c 52 53 static void vmemmap_pte_range(pmd_t *pmd, unsigned long addr, 54 unsigned long end, 55 struct vmemmap_remap_walk *walk) 56 { 57 pte_t *pte; 58 59 pte = pte_offset_kernel(pmd, addr); 60 61 /* 62 * The reuse_page is found 'first' in table walk before we start 63 * remapping (which is calling @walk->remap_pte). 64 */ 65 if (!walk->reuse_page) { 66 BUG_ON(pte_none(*pte)); 67 BUG_ON(walk->reuse_addr != addr); 68 > 69 walk->reuse_page = pte_page(*pte++); 70 /* 71 * Because the reuse address is part of the range that we are 72 * walking, skip the reuse address range. 73 */ 74 addr += PAGE_SIZE; 75 } 76 77 for (; addr != end; addr += PAGE_SIZE, pte++) { 78 BUG_ON(pte_none(*pte)); 79 80 walk->remap_pte(pte, addr, walk); 81 } 82 } 83 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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