tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dddcbc139e96bd18d8c65ef7b7e440f0d32457c2 commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 8 weeks ago config: m68k-randconfig-s032-20200814 (attached as .config) compiler: m68k-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: v0.6.2-168-g9554805c-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=m68k 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/rpmsg/qcom_glink_smem.c:93:48: sparse: got void * drivers/rpmsg/qcom_glink_smem.c:96:47: sparse: expected void const volatile [noderef] __iomem *src drivers/rpmsg/qcom_glink_smem.c:96:47: sparse: got void *fifo -- drivers/ide/ide-io-std.c:185:25: sparse: sparse: cast removes address space '__iomem' of expression drivers/ide/ide-io-std.c:185:25: sparse: got unsigned int [usertype] * drivers/ide/ide-io-std.c:200:17: sparse: sparse: cast removes address space '__iomem' of expression drivers/ide/ide-io-std.c:200:17: sparse: got unsigned short [usertype] * drivers/ide/ide-io-std.c:229:25: sparse: sparse: cast removes address space '__iomem' of expression drivers/ide/ide-io-std.c:229:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected unsigned int volatile [noderef] [usertype] __iomem *port @@ got unsigned int [usertype] * @@ drivers/ide/ide-io-std.c:229:25: sparse: expected unsigned int volatile [noderef] [usertype] __iomem *port drivers/ide/ide-io-std.c:229:25: sparse: got unsigned int [usertype] * drivers/ide/ide-io-std.c:244:17: sparse: sparse: cast removes address space '__iomem' of expression drivers/ide/ide-io-std.c:244:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected unsigned short volatile [noderef] [usertype] __iomem *port @@ got unsigned short [usertype] * @@ drivers/ide/ide-io-std.c:244:17: sparse: expected unsigned short volatile [noderef] [usertype] __iomem *port drivers/ide/ide-io-std.c:244:17: sparse: got unsigned short [usertype] * -- drivers/ide/q40ide.c:79:17: sparse: got unsigned short [usertype] * drivers/ide/q40ide.c:83:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected unsigned short volatile [noderef] [usertype] __iomem *port @@ got unsigned short [usertype] * @@ drivers/ide/q40ide.c:83:25: sparse: expected unsigned short volatile [noderef] [usertype] __iomem *port drivers/ide/q40ide.c:83:25: sparse: got unsigned short [usertype] * drivers/ide/q40ide.c:92:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected unsigned short volatile [noderef] [usertype] __iomem *port @@ got unsigned short [usertype] * @@ drivers/ide/q40ide.c:92:17: sparse: expected unsigned short volatile [noderef] [usertype] __iomem *port drivers/ide/q40ide.c:92:17: sparse: got unsigned short [usertype] * drivers/ide/q40ide.c:96:26: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected unsigned short volatile [noderef] [usertype] __iomem *port @@ got unsigned short [usertype] * @@ drivers/ide/q40ide.c:96:26: sparse: expected unsigned short volatile [noderef] [usertype] __iomem *port drivers/ide/q40ide.c:96:26: sparse: got unsigned short [usertype] * vim +93 drivers/rpmsg/qcom_glink_smem.c caf989c350e8e0b Bjorn Andersson 2017-08-24 78 caf989c350e8e0b Bjorn Andersson 2017-08-24 79 static void glink_smem_rx_peak(struct qcom_glink_pipe *np, b88eee975a26b15 Bjorn Andersson 2017-08-24 80 void *data, unsigned int offset, size_t count) caf989c350e8e0b Bjorn Andersson 2017-08-24 81 { caf989c350e8e0b Bjorn Andersson 2017-08-24 82 struct glink_smem_pipe *pipe = to_smem_pipe(np); caf989c350e8e0b Bjorn Andersson 2017-08-24 83 size_t len; caf989c350e8e0b Bjorn Andersson 2017-08-24 84 u32 tail; caf989c350e8e0b Bjorn Andersson 2017-08-24 85 caf989c350e8e0b Bjorn Andersson 2017-08-24 86 tail = le32_to_cpu(*pipe->tail); b88eee975a26b15 Bjorn Andersson 2017-08-24 87 tail += offset; b88eee975a26b15 Bjorn Andersson 2017-08-24 88 if (tail >= pipe->native.length) b88eee975a26b15 Bjorn Andersson 2017-08-24 89 tail -= pipe->native.length; caf989c350e8e0b Bjorn Andersson 2017-08-24 90 caf989c350e8e0b Bjorn Andersson 2017-08-24 91 len = min_t(size_t, count, pipe->native.length - tail); 928002a5e9dab2d Arun Kumar Neelakantam 2018-10-03 92 if (len) 928002a5e9dab2d Arun Kumar Neelakantam 2018-10-03 @93 memcpy_fromio(data, pipe->fifo + tail, len); caf989c350e8e0b Bjorn Andersson 2017-08-24 94 928002a5e9dab2d Arun Kumar Neelakantam 2018-10-03 95 if (len != count) 928002a5e9dab2d Arun Kumar Neelakantam 2018-10-03 @96 memcpy_fromio(data + len, pipe->fifo, (count - len)); caf989c350e8e0b Bjorn Andersson 2017-08-24 97 } caf989c350e8e0b Bjorn Andersson 2017-08-24 98 :::::: The code at line 93 was first introduced by commit :::::: 928002a5e9dab2ddc1a0fe3e00739e89be30dc6b rpmsg: glink: smem: Support rx peak for size less than 4 bytes :::::: TO: Arun Kumar Neelakantam <aneela(a)codeaurora.org&gt; :::::: CC: Bjorn Andersson <bjorn.andersson(a)linaro.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org