Hi Luc, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dcc0b49040c70ad827a7f3d58a21b01fdb14e749 commit: e5fc436f06eef54ef512ea55a9db8eb9f2e76959 sparse: use static inline for __chk_{user,io}_ptr() date: 6 months ago config: sh-randconfig-s031-20210213 (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: v0.6.3-215-g0fb77bb6-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__' ARCH=sh 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/sh/kernel/cpu/sh2a/clock-sh7206.c:26:44: sparse: expected void const volatile [noderef] __iomem *ptr arch/sh/kernel/cpu/sh2a/clock-sh7206.c:26:44: sparse: got unsigned int arch/sh/kernel/cpu/sh2a/clock-sh7206.c:35:20: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected void const volatile [noderef] __iomem *ptr @@ got unsigned int @@ arch/sh/kernel/cpu/sh2a/clock-sh7206.c:35:20: sparse: expected void const volatile [noderef] __iomem *ptr arch/sh/kernel/cpu/sh2a/clock-sh7206.c:35:20: sparse: got unsigned int arch/sh/kernel/cpu/sh2a/clock-sh7206.c:45:46: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected void const volatile [noderef] __iomem *ptr @@ got unsigned int @@ arch/sh/kernel/cpu/sh2a/clock-sh7206.c:45:46: sparse: expected void const volatile [noderef] __iomem *ptr arch/sh/kernel/cpu/sh2a/clock-sh7206.c:45:46: sparse: got unsigned int arch/sh/kernel/cpu/sh2a/clock-sh7206.c:54:20: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected void const volatile [noderef] __iomem *ptr @@ got unsigned int @@ arch/sh/kernel/cpu/sh2a/clock-sh7206.c:54:20: sparse: expected void const volatile [noderef] __iomem *ptr arch/sh/kernel/cpu/sh2a/clock-sh7206.c:54:20: sparse: got unsigned int -- fs/cifs/cifs_debug.c:770:14: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected char const *__gu_addr @@ got char const [noderef] __user *buffer @@ fs/cifs/cifs_debug.c:770:14: sparse: expected char const *__gu_addr fs/cifs/cifs_debug.c:770:14: sparse: got char const [noderef] __user *buffer fs/cifs/cifs_debug.c:770:14: sparse: expected void const volatile [noderef] __user *ptr fs/cifs/cifs_debug.c:770:14: sparse: got char const *__gu_addr -- fs/cifs/ioctl.c:214:29: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected int const *__gu_addr @@ got int [noderef] __user * @@ fs/cifs/ioctl.c:214:29: sparse: expected int const *__gu_addr fs/cifs/ioctl.c:214:29: sparse: got int [noderef] __user * fs/cifs/ioctl.c:214:29: sparse: expected void const volatile [noderef] __user *ptr fs/cifs/ioctl.c:214:29: sparse: got int const *__gu_addr -- fs/cifs/dfs_cache.c:195:14: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected char const *__gu_addr @@ got char const [noderef] __user *buffer @@ fs/cifs/dfs_cache.c:195:14: sparse: expected char const *__gu_addr fs/cifs/dfs_cache.c:195:14: sparse: got char const [noderef] __user *buffer fs/cifs/dfs_cache.c:195:14: sparse: expected void const volatile [noderef] __user *ptr fs/cifs/dfs_cache.c:195:14: sparse: got char const *__gu_addr -- fs/cifs/smb2ops.c:2049:13: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned int const *__gu_addr @@ got unsigned int [noderef] __user * @@ fs/cifs/smb2ops.c:2049:13: sparse: expected unsigned int const *__gu_addr fs/cifs/smb2ops.c:2049:13: sparse: got unsigned int [noderef] __user * fs/cifs/smb2ops.c:2049:13: sparse: expected void const volatile [noderef] __user *ptr fs/cifs/smb2ops.c:2049:13: sparse: got unsigned int const *__gu_addr vim +26 arch/sh/kernel/cpu/sh2a/clock-sh7206.c 9d4436a6fbc8c5 Yoshinori Sato 2006-11-05 23 9d4436a6fbc8c5 Yoshinori Sato 2006-11-05 24 static void master_clk_init(struct clk *clk) 9d4436a6fbc8c5 Yoshinori Sato 2006-11-05 25 { 16b259203c513e Paul Mundt 2010-11-01 @26 clk->rate *= pll2_mult * pll1rate[(__raw_readw(FREQCR) >> 8) & 0x0007]; 9d4436a6fbc8c5 Yoshinori Sato 2006-11-05 27 } 9d4436a6fbc8c5 Yoshinori Sato 2006-11-05 28 :::::: The code at line 26 was first introduced by commit :::::: 16b259203c513ed28bd31cc9a981e0d3ad517943 sh: migrate SH_CLK_MD to mode pin API. :::::: 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