tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 25a1298726e97b9d25379986f5d54d9e62ad6e93 commit: e5fc436f06eef54ef512ea55a9db8eb9f2e76959 sparse: use static inline for __chk_{user,io}_ptr() date: 9 months ago config: sh-randconfig-s032-20210515 (attached as .config) compiler: sh4-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: v0.6.3-341-g8af24329-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-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=sh If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; iwyu warnings: (new ones prefixed by >>) vim +16 arch/sh/kernel/cpu/sh3/serial-sh7720.c 61a6976bf19a6cf Paul Mundt 2011-06-14 7 61a6976bf19a6cf Paul Mundt 2011-06-14 8 static void sh7720_sci_init_pins(struct uart_port *port, unsigned int cflag) 61a6976bf19a6cf Paul Mundt 2011-06-14 9 { 61a6976bf19a6cf Paul Mundt 2011-06-14 10 unsigned short data; 61a6976bf19a6cf Paul Mundt 2011-06-14 11 61a6976bf19a6cf Paul Mundt 2011-06-14 12 if (cflag & CRTSCTS) { 61a6976bf19a6cf Paul Mundt 2011-06-14 13 /* enable RTS/CTS */ 61a6976bf19a6cf Paul Mundt 2011-06-14 14 if (port->mapbase == 0xa4430000) { /* SCIF0 */ 61a6976bf19a6cf Paul Mundt 2011-06-14 15 /* Clear PTCR bit 9-2; enable all scif pins but sck */ 61a6976bf19a6cf Paul Mundt 2011-06-14 @16 data = __raw_readw(PORT_PTCR); 61a6976bf19a6cf Paul Mundt 2011-06-14 17 __raw_writew((data & 0xfc03), PORT_PTCR); 61a6976bf19a6cf Paul Mundt 2011-06-14 18 } else if (port->mapbase == 0xa4438000) { /* SCIF1 */ 61a6976bf19a6cf Paul Mundt 2011-06-14 19 /* Clear PVCR bit 9-2 */ 61a6976bf19a6cf Paul Mundt 2011-06-14 20 data = __raw_readw(PORT_PVCR); 61a6976bf19a6cf Paul Mundt 2011-06-14 21 __raw_writew((data & 0xfc03), PORT_PVCR); 61a6976bf19a6cf Paul Mundt 2011-06-14 22 } 61a6976bf19a6cf Paul Mundt 2011-06-14 23 } else { 61a6976bf19a6cf Paul Mundt 2011-06-14 24 if (port->mapbase == 0xa4430000) { /* SCIF0 */ 61a6976bf19a6cf Paul Mundt 2011-06-14 25 /* Clear PTCR bit 5-2; enable only tx and rx */ 61a6976bf19a6cf Paul Mundt 2011-06-14 26 data = __raw_readw(PORT_PTCR); 61a6976bf19a6cf Paul Mundt 2011-06-14 27 __raw_writew((data & 0xffc3), PORT_PTCR); 61a6976bf19a6cf Paul Mundt 2011-06-14 28 } else if (port->mapbase == 0xa4438000) { /* SCIF1 */ 61a6976bf19a6cf Paul Mundt 2011-06-14 29 /* Clear PVCR bit 5-2 */ 61a6976bf19a6cf Paul Mundt 2011-06-14 30 data = __raw_readw(PORT_PVCR); 61a6976bf19a6cf Paul Mundt 2011-06-14 31 __raw_writew((data & 0xffc3), PORT_PVCR); 61a6976bf19a6cf Paul Mundt 2011-06-14 32 } 61a6976bf19a6cf Paul Mundt 2011-06-14 33 } 61a6976bf19a6cf Paul Mundt 2011-06-14 34 } 61a6976bf19a6cf Paul Mundt 2011-06-14 35 :::::: The code at line 16 was first introduced by commit :::::: 61a6976bf19a6cf5dfcf37c3536665b316f22d49 serial: sh-sci: Abstract register maps. :::::: TO: Paul Mundt <lethal(a)linux-sh.org&gt; :::::: CC: Paul Mundt <lethal(a)linux-sh.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org