tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 049eb096da48db0421dd5e358b9b082a1a8a2025 commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 7 weeks ago config: mips-randconfig-s032-20200808 (attached as .config) compiler: mips64el-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: v0.6.2-118-ge1578773-dirty git checkout 670d0a4b10704667765f7d18f7592993d02783aa # 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=mips 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/video/fbdev/sstfb.c:337:23: sparse: expected void *__s drivers/video/fbdev/sstfb.c:337:23: sparse: got char [noderef] __iomem *screen_base drivers/video/fbdev/sstfb.c: note: in included file (through arch/mips/include/asm/mmiowb.h, include/linux/spinlock.h, include/linux/seqlock.h, ...): arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 arch/mips/include/asm/io.h:354:1: sparse: sparse: cast to restricted __le32 vim +337 drivers/video/fbdev/sstfb.c ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 330 ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 331 /* ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 332 * clear lfb screen ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 333 */ ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 334 static void sstfb_clear_screen(struct fb_info *info) ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 335 { ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 336 /* clear screen */ ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 @337 fb_memset(info->screen_base, 0, info->fix.smem_len); ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 338 } ^1da177e4c3f415 drivers/video/sstfb.c Linus Torvalds 2005-04-16 339 :::::: The code at line 337 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