tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git memfd-secret/v19.3 head: 3ab055334ff06fa6231e2cf27fe7fff57bb7d87f commit: 545bdc70882cbd28aebc1d6392fdc0249f795d2f [4/7] mm: introduce memfd_secret system call to create "secret" memory areas config: x86_64-rhel-8.3 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git/commit/?id... git remote add rppt https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git git fetch --no-tags rppt memfd-secret/v19.3 git checkout 545bdc70882cbd28aebc1d6392fdc0249f795d2f # save the attached .config to linux build tree make W=1 W=1 ARCH=x86_64 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 >>): mm/secretmem.c: In function 'secretmem_fault': 78 | set_direct_map_default_noflush(page, 1); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/set_memory.h:9, from mm/secretmem.c:19: arch/x86/include/asm/set_memory.h:84:5: note: declared here 84 | int set_direct_map_default_noflush(struct page *page); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/set_direct_map_default_noflush +78 mm/secretmem.c 37 38 static bool secretmem_enable __ro_after_init; 39 module_param_named(enable, secretmem_enable, bool, 0400); 40 MODULE_PARM_DESC(secretmem_enable, 41 "Enable secretmem and memfd_secret(2) system call"); 42 43 static vm_fault_t secretmem_fault(struct vm_fault *vmf) 44 { 45 struct address_space *mapping = vmf->vma->vm_file->f_mapping; 46 struct inode *inode = file_inode(vmf->vma->vm_file); 47 pgoff_t offset = vmf->pgoff; 48 gfp_t gfp = vmf->gfp_mask; 49 unsigned long addr; 50 struct page *page; 51 int err; 52 53 if (((loff_t)vmf->pgoff << PAGE_SHIFT) >= i_size_read(inode)) 54 return vmf_error(-EINVAL); 55 56 retry: 57 page = find_lock_page(mapping, offset); 58 if (!page) { 59 page = alloc_page(gfp | __GFP_ZERO); 60 if (!page) 61 return VM_FAULT_OOM; 62 63 err = set_direct_map_invalid_noflush(page); 64 if (err) { 65 put_page(page); 66 return vmf_error(err); 67 } 68 69 __SetPageUptodate(page); 70 err = add_to_page_cache_lru(page, mapping, offset, gfp); 71 if (unlikely(err)) { 72 put_page(page); 73 /* 74 * If a split of large page was required, it 75 * already happened when we marked the page invalid 76 * which guarantees that this call won't fail 77 */ 79 if (err == -EEXIST) 80 goto retry; 81 82 return vmf_error(err); 83 } 84 85 addr = (unsigned long)page_address(page); 86 flush_tlb_kernel_range(addr, addr + PAGE_SIZE); 87 } 88 89 vmf->page = page; 90 return VM_FAULT_LOCKED; 91 } 92 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org