tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 80be5998ad6339e3e804a772723390cb50b96428 commit: 6895c5ba7bdcc55eacad03cf309ab23be63b9cac powerpc/xmon: Select CONSOLE_POLL for the 8xx date: 8 months ago config: powerpc64-randconfig-s032-20210916 (attached as .config) compiler: powerpc-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: v0.6.4-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 6895c5ba7bdcc55eacad03cf309ab23be63b9cac # 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__' 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 >>) drivers/tty/serial/cpm_uart/cpm_uart_core.c:1052:13: sparse: expected struct cpm_buf_desc volatile [usertype] *bdp drivers/tty/serial/cpm_uart/cpm_uart_core.c:1052:13: sparse: got struct cpm_buf_desc [noderef] [usertype] __iomem *rx_cur drivers/tty/serial/cpm_uart/cpm_uart_core.c:1071:21: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct cpm_buf_desc volatile [usertype] *bdp @@ got struct cpm_buf_desc [noderef] [usertype] __iomem *rx_bd_base @@ drivers/tty/serial/cpm_uart/cpm_uart_core.c:1071:21: sparse: expected struct cpm_buf_desc volatile [usertype] *bdp drivers/tty/serial/cpm_uart/cpm_uart_core.c:1071:21: sparse: got struct cpm_buf_desc [noderef] [usertype] __iomem *rx_bd_base drivers/tty/serial/cpm_uart/cpm_uart_core.c:1074:23: sparse: expected struct cpm_buf_desc [noderef] [usertype] __iomem *rx_cur drivers/tty/serial/cpm_uart/cpm_uart_core.c:1074:23: sparse: got struct cpm_buf_desc [usertype] * drivers/tty/serial/cpm_uart/cpm_uart_core.c:1279:39: sparse: sparse: context imbalance in 'cpm_uart_console_write' - unexpected unlock vim +1052 drivers/tty/serial/cpm_uart/cpm_uart_core.c 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1043 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1044 static int poll_wait_key(char *obuf, struct uart_cpm_port *pinfo) 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1045 { 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1046 u_char c, *cp; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1047 volatile cbd_t *bdp; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1048 int i; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1049 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1050 /* Get the address of the host memory buffer. 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1051 */ 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 @1052 bdp = pinfo->rx_cur; be28c1e3ca2988 drivers/tty/serial/cpm_uart/cpm_uart_core.c Christophe Leroy 2018-09-14 1053 if (bdp->cbd_sc & BD_SC_EMPTY) be28c1e3ca2988 drivers/tty/serial/cpm_uart/cpm_uart_core.c Christophe Leroy 2018-09-14 1054 return NO_POLL_CHAR; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1055 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1056 /* If the buffer address is in the CPM DPRAM, don't 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1057 * convert it. 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1058 */ 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1059 cp = cpm2cpu_addr(bdp->cbd_bufaddr, pinfo); 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1060 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1061 if (obuf) { 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1062 i = c = bdp->cbd_datlen; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1063 while (i-- > 0) 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1064 *obuf++ = *cp++; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1065 } else 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1066 c = *cp; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1067 bdp->cbd_sc &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV | BD_SC_ID); 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1068 bdp->cbd_sc |= BD_SC_EMPTY; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1069 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1070 if (bdp->cbd_sc & BD_SC_WRAP) 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1071 bdp = pinfo->rx_bd_base; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1072 else 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1073 bdp++; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 @1074 pinfo->rx_cur = (cbd_t *)bdp; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1075 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1076 return (int)c; 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1077 } 8e21d04c077c50 drivers/serial/cpm_uart/cpm_uart_core.c Jason Wessel 2008-07-23 1078 :::::: The code at line 1052 was first introduced by commit :::::: 8e21d04c077c50284bdad10fda8f8cea674458e1 kgdb: kgdboc console poll hooks for cpm uart :::::: TO: Jason Wessel <jason.wessel(a)windriver.com&gt; :::::: CC: Jason Wessel <jason.wessel(a)windriver.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org