tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f8e6dfc64f6135d1b6c5215c14cd30b9b60a0008 commit: e5fc436f06eef54ef512ea55a9db8eb9f2e76959 sparse: use static inline for __chk_{user,io}_ptr() date: 12 months ago config: arm-randconfig-s032-20210813 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0 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 # 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 e5fc436f06eef54ef512ea55a9db8eb9f2e76959 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 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/alignment.c:775:25: sparse: expected void const volatile [noderef] __user *ptr arch/arm/mm/alignment.c:775:25: sparse: got unsigned int [usertype] *ip arch/arm/mm/alignment.c:790:25: sparse: expected void const volatile [noderef] __user *ptr arch/arm/mm/alignment.c:790:25: sparse: got unsigned short [usertype] *ip vim +775 arch/arm/mm/alignment.c c2860d43f5dfab George G. Davis 2009-06-04 768 1bb9fb0a147f9d Russell King 2019-09-06 769 static int alignment_get_arm(struct pt_regs *regs, u32 *ip, u32 *inst) 67e15fa5b487ad Russell King 2019-08-31 770 { 67e15fa5b487ad Russell King 2019-08-31 771 u32 instr = 0; 67e15fa5b487ad Russell King 2019-08-31 772 int fault; 67e15fa5b487ad Russell King 2019-08-31 773 67e15fa5b487ad Russell King 2019-08-31 774 if (user_mode(regs)) 67e15fa5b487ad Russell King 2019-08-31 @775 fault = get_user(instr, ip); 67e15fa5b487ad Russell King 2019-08-31 776 else 25f12ae45fc193 Christoph Hellwig 2020-06-17 777 fault = get_kernel_nofault(instr, ip); 67e15fa5b487ad Russell King 2019-08-31 778 67e15fa5b487ad Russell King 2019-08-31 779 *inst = __mem_to_opcode_arm(instr); 67e15fa5b487ad Russell King 2019-08-31 780 67e15fa5b487ad Russell King 2019-08-31 781 return fault; 67e15fa5b487ad Russell King 2019-08-31 782 } 67e15fa5b487ad Russell King 2019-08-31 783 67e15fa5b487ad Russell King 2019-08-31 784 static int alignment_get_thumb(struct pt_regs *regs, u16 *ip, u16 *inst) 67e15fa5b487ad Russell King 2019-08-31 785 { 67e15fa5b487ad Russell King 2019-08-31 786 u16 instr = 0; 67e15fa5b487ad Russell King 2019-08-31 787 int fault; 67e15fa5b487ad Russell King 2019-08-31 788 67e15fa5b487ad Russell King 2019-08-31 789 if (user_mode(regs)) 67e15fa5b487ad Russell King 2019-08-31 @790 fault = get_user(instr, ip); 67e15fa5b487ad Russell King 2019-08-31 791 else 25f12ae45fc193 Christoph Hellwig 2020-06-17 792 fault = get_kernel_nofault(instr, ip); 67e15fa5b487ad Russell King 2019-08-31 793 67e15fa5b487ad Russell King 2019-08-31 794 *inst = __mem_to_opcode_thumb16(instr); 67e15fa5b487ad Russell King 2019-08-31 795 67e15fa5b487ad Russell King 2019-08-31 796 return fault; 67e15fa5b487ad Russell King 2019-08-31 797 } 67e15fa5b487ad Russell King 2019-08-31 798 :::::: The code at line 775 was first introduced by commit :::::: 67e15fa5b487adb9b78a92789eeff2d6ec8f5cee ARM: mm: fix alignment handler faults under memory pressure :::::: TO: Russell King <rmk+kernel(a)armlinux.org.uk&gt; :::::: CC: Russell King <rmk+kernel(a)armlinux.org.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org