tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8ab774587903771821b59471cc723bba6d893942 commit: caed89dab0ca0e73d7e016c04e1f5957650f4ec3 ARM: 9128/1: mm: Refactor the __do_page_fault() date: 4 weeks ago config: arm-randconfig-s031-20211116 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout caed89dab0ca0e73d7e016c04e1f5957650f4ec3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/mm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) arch/arm/mm/fault.c:210:24: sparse: expected restricted vm_fault_t arch/arm/mm/fault.c:210:24: sparse: got int arch/arm/mm/fault.c:214:32: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted vm_fault_t @@ got int @@ arch/arm/mm/fault.c:214:32: sparse: expected restricted vm_fault_t arch/arm/mm/fault.c:214:32: sparse: got int arch/arm/mm/fault.c:216:32: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted vm_fault_t @@ got int @@ arch/arm/mm/fault.c:216:32: sparse: expected restricted vm_fault_t arch/arm/mm/fault.c:216:32: sparse: got int arch/arm/mm/fault.c:218:32: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted vm_fault_t @@ got int @@ arch/arm/mm/fault.c:218:32: sparse: expected restricted vm_fault_t arch/arm/mm/fault.c:218:32: sparse: got int arch/arm/mm/fault.c:226:24: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted vm_fault_t @@ got int @@ arch/arm/mm/fault.c:226:24: sparse: expected restricted vm_fault_t arch/arm/mm/fault.c:226:24: sparse: got int arch/arm/mm/fault.c:312:13: sparse: sparse: restricted vm_fault_t degrades to integer arch/arm/mm/fault.c:312:13: sparse: sparse: restricted vm_fault_t degrades to integer arch/arm/mm/fault.c:345:24: sparse: sparse: restricted vm_fault_t degrades to integer vim +210 arch/arm/mm/fault.c 202 203 static vm_fault_t __kprobes 204 __do_page_fault(struct mm_struct *mm, unsigned long addr, unsigned int fsr, 205 unsigned int flags, struct task_struct *tsk, 206 struct pt_regs *regs) 207 { 208 struct vm_area_struct *vma = find_vma(mm, addr); 209 if (unlikely(!vma)) 211 212 if (unlikely(vma->vm_start > addr)) { 213 if (!(vma->vm_flags & VM_GROWSDOWN)) 214 return VM_FAULT_BADMAP; 215 if (addr < FIRST_USER_ADDRESS) 216 return VM_FAULT_BADMAP; 217 if (expand_stack(vma, addr)) 218 return VM_FAULT_BADMAP; 219 } 220 221 /* 222 * Ok, we have a good vm_area for this 223 * memory access, so we can handle it. 224 */ 225 if (access_error(fsr, vma)) 226 return VM_FAULT_BADACCESS; 227 228 return handle_mm_fault(vma, addr & PAGE_MASK, flags, regs); 229 } 230 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org