tree: https://github.com/linuxppc/linux next-test head: 3411d1b25358f6007f411b1fa629ac040b8f59ad commit: 60e66d033c83b3677fd54b3bc3a9643b56b64f04 [29/97] powerpc/uaccess: Refactor get/put_user() and __get/put_user() config: powerpc64-randconfig-s032-20210314 (attached as .config) compiler: powerpc-linux-gcc (GCC) 9.3.0 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: v0.6.3-262-g5e674421-dirty # https://github.com/linuxppc/linux/commit/60e66d033c83b3677fd54b3bc3a9643b... git remote add linuxppc https://github.com/linuxppc/linux git fetch --no-tags linuxppc next-test git checkout 60e66d033c83b3677fd54b3bc3a9643b56b64f04 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc64 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/powerpc/math-emu/math.c:228:21: sparse: sparse: Using plain integer as NULL pointer arch/powerpc/math-emu/math.c:228:31: sparse: sparse: Using plain integer as NULL pointer arch/powerpc/math-emu/math.c:228:41: sparse: sparse: Using plain integer as NULL pointer arch/powerpc/math-emu/math.c:228:51: sparse: sparse: Using plain integer as NULL pointer arch/powerpc/math-emu/math.c:237:13: sparse: expected unsigned int [noderef] __user *_gu_addr arch/powerpc/math-emu/math.c:237:13: sparse: got unsigned int [usertype] * vim +237 arch/powerpc/math-emu/math.c ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 224 ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 225 int ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 226 do_mathemu(struct pt_regs *regs) ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 227 { ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 228 void *op0 = 0, *op1 = 0, *op2 = 0, *op3 = 0; ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 229 unsigned long pc = regs->nip; ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 230 signed short sdisp; ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 231 u32 insn = 0; ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 232 int idx = 0; ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 233 int (*func)(void *, void *, void *, void *); ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 234 int type = 0; ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 235 int eflag, trap; ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 236 ^1da177e4c3f41 arch/ppc/math-emu/math.c Linus Torvalds 2005-04-16 @237 if (get_user(insn, (u32 *)pc)) :::::: The code at line 237 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org