Hi Slava, kernel test robot noticed the following build errors:
[auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Slava-Imameev/bpf-Support-multi-level-pointer-params-via-PTR_TO_MEM-for-trampolines/20260218-062417 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20260217221357.18215-3-slava.imameev%40crowdstrike.com patch subject: [PATCH bpf-next v2 2/2] selftests/bpf: Add trampolines multi-level pointer params test coverage config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20260218/[email protected]/config) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260218/[email protected]/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): >> net/bpf/test_run.c:737:2: error: call to undeclared function >> 'flush_tlb_kernel_range'; ISO C99 and later do not support implicit function >> declarations [-Wimplicit-function-declaration] 737 | flush_tlb_kernel_range((unsigned long)page_address(page), | ^ net/bpf/test_run.c:760:2: error: call to undeclared function 'flush_tlb_kernel_range'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 760 | flush_tlb_kernel_range((unsigned long)addr, | ^ 2 errors generated. vim +/flush_tlb_kernel_range +737 net/bpf/test_run.c 709 710 static void *create_bad_kaddr(void) 711 { 712 /* 713 * Try to get an address that passes kernel range checks but causes 714 * a page fault handler invocation if accessed from a BPF program. 715 */ 716 #if defined(CONFIG_ARCH_HAS_SET_MEMORY) && defined(CONFIG_X86) 717 void *addr = vmalloc(PAGE_SIZE); 718 719 if (!addr) 720 return NULL; 721 /* Make it non-present - any access will fault */ 722 if (set_memory_np((unsigned long)addr, 1)) { 723 vfree(addr); 724 return NULL; 725 } 726 return addr; 727 #elif defined(CONFIG_ARCH_HAS_SET_DIRECT_MAP) 728 struct page *page = alloc_page(GFP_KERNEL); 729 730 if (!page) 731 return NULL; 732 /* Remove from direct map - any access will fault */ 733 if (set_direct_map_invalid_noflush(page)) { 734 __free_page(page); 735 return NULL; 736 } > 737 flush_tlb_kernel_range((unsigned long)page_address(page), 738 (unsigned long)page_address(page) + PAGE_SIZE); 739 return page_address(page); 740 #endif 741 return NULL; 742 } 743 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
