[kbuild-all] [android-common:android13-5.10 3716/13215] arch/arm64/mm/fault.c:492:31: sparse: sparse: incorrect type in return expression (different base types)

tree: https://android.googlesource.com/kernel/common android13-5.10 head: 758c95b6cef03a5c89e47a1ae84547f6210b539c commit: 2fd69fa6bcab984b56ccfd4860b10f11f1966bed [3716/13215] FROMLIST: arm64/mm: add speculative page fault config: arm64-randconfig-s032-20210818 (attached as .config) compiler: aarch64-linux-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: v0.6.3-348-gf0e6938b-dirty git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android13-5.10 git checkout 2fd69fa6bcab984b56ccfd4860b10f11f1966bed # 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=arm64 SHELL=/bin/bash arch/arm64/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/arm64/mm/fault.c:492:31: sparse: expected int arch/arm64/mm/fault.c:492:31: sparse: got restricted vm_fault_t arch/arm64/mm/fault.c:561:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted vm_fault_t [usertype] fault @@ got int @@ arch/arm64/mm/fault.c:561:15: sparse: expected restricted vm_fault_t [usertype] fault arch/arm64/mm/fault.c:561:15: sparse: got int arch/arm64/mm/fault.c:591:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted vm_fault_t [usertype] fault @@ got int @@ arch/arm64/mm/fault.c:591:15: sparse: expected restricted vm_fault_t [usertype] fault arch/arm64/mm/fault.c:591:15: sparse: got int arch/arm64/mm/fault.c:620:13: sparse: sparse: restricted vm_fault_t degrades to integer arch/arm64/mm/fault.c:620:13: sparse: sparse: restricted vm_fault_t degrades to integer arch/arm64/mm/fault.c:665:39: sparse: sparse: restricted vm_fault_t degrades to integer vim +492 arch/arm64/mm/fault.c 1d18c47c735e8a Catalin Marinas 2012-03-05 471 1d18c47c735e8a Catalin Marinas 2012-03-05 472 if (unlikely(!vma)) 4745224b45097d Anshuman Khandual 2019-06-07 473 return VM_FAULT_BADMAP; 1d18c47c735e8a Catalin Marinas 2012-03-05 474 1d18c47c735e8a Catalin Marinas 2012-03-05 475 /* 1d18c47c735e8a Catalin Marinas 2012-03-05 476 * Ok, we have a good vm_area for this memory access, so we can handle 1d18c47c735e8a Catalin Marinas 2012-03-05 477 * it. 1d18c47c735e8a Catalin Marinas 2012-03-05 478 */ 4745224b45097d Anshuman Khandual 2019-06-07 479 if (unlikely(vma->vm_start > addr)) { 4745224b45097d Anshuman Khandual 2019-06-07 480 if (!(vma->vm_flags & VM_GROWSDOWN)) 4745224b45097d Anshuman Khandual 2019-06-07 481 return VM_FAULT_BADMAP; 4745224b45097d Anshuman Khandual 2019-06-07 482 if (expand_stack(vma, addr)) 4745224b45097d Anshuman Khandual 2019-06-07 483 return VM_FAULT_BADMAP; 4745224b45097d Anshuman Khandual 2019-06-07 484 } 4745224b45097d Anshuman Khandual 2019-06-07 485 db6f41063cbdb5 Will Deacon 2013-07-19 486 /* db6f41063cbdb5 Will Deacon 2013-07-19 487 * Check that the permissions on the VMA allow for the fault which cab15ce604e550 Catalin Marinas 2016-08-11 488 * occurred. db6f41063cbdb5 Will Deacon 2013-07-19 489 */ 4745224b45097d Anshuman Khandual 2019-06-07 490 if (!(vma->vm_flags & vm_flags)) 4745224b45097d Anshuman Khandual 2019-06-07 491 return VM_FAULT_BADACCESS; 6a1bb025d28e10 Peter Xu 2020-08-11 @492 return handle_mm_fault(vma, addr & PAGE_MASK, mm_flags, regs); 1d18c47c735e8a Catalin Marinas 2012-03-05 493 } 1d18c47c735e8a Catalin Marinas 2012-03-05 494 :::::: The code at line 492 was first introduced by commit :::::: 6a1bb025d28e1026fead73b7b33e2dfccba3f4d2 mm/arm64: use general page fault accounting :::::: TO: Peter Xu <peterx(a)redhat.com&gt; :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org