tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 10207e3a840b47b5eae573486a88fb6e29884f77 commit: f982d9b7c628388dae73b723cc2302cbd091cab5 [2876/4656] arc: remove set_fs() config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220209/202202091707.w4yhaEQx-lk...) compiler: arceb-elf-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/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout f982d9b7c628388dae73b723cc2302cbd091cab5 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arc SHELL=/bin/bash drivers/tty/ipwireless/ 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 >>) drivers/tty/ipwireless/tty.c: note: in included file (through include/linux/uaccess.h, include/linux/sched/task.h, include/linux/sched/signal.h, ...): arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr -- drivers/tty/ipwireless/network.c: note: in included file (through include/linux/uaccess.h, include/linux/sched/task.h, include/linux/sched/signal.h, ...): arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr arch/arc/include/asm/uaccess.h:42:24: sparse: expected void const volatile [noderef] __user *ptr arch/arc/include/asm/uaccess.h:42:24: sparse: got unsigned long addr vim +42 arch/arc/include/asm/uaccess.h 25 26 /* 27 * Algorithmically, for __access_ok() we want do: 28 * (start < TASK_SIZE) && (start+len < TASK_SIZE) 29 * 30 * This can however be rewritten as follows: 31 * (len <= TASK_SIZE) && (start+len < TASK_SIZE) 32 * 33 * Because it essentially checks if buffer end is within limit and @len is 34 * non-ngeative, which implies that buffer start will be within limit too. 35 * 36 * The reason for rewriting being, for majority of cases, @len is generally 37 * compile time constant, causing first sub-expression to be compile time 38 * subsumed. 39 */ 40 static inline int __access_ok(unsigned long addr, unsigned long size) 41 { 43 return size <= TASK_SIZE && addr <= TASK_SIZE - size; 44 } 45 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org