[kbuild-all] drivers/char/tpm/tpm_ibmvtpm.c:130:30: sparse: sparse: cast removes address space '__iomem' of expression

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 06a81c1c7db9bd5de0bd38cd5acc44bb22b99150 commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 7 weeks ago config: powerpc64-randconfig-s032-20200808 (attached as .config) compiler: powerpc64-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=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/char/tpm/tpm_ibmvtpm.c:131:23: sparse: expected void * drivers/char/tpm/tpm_ibmvtpm.c:234:17: sparse: sparse: cast removes address space '__iomem' of expression drivers/char/tpm/tpm_ibmvtpm.c:369:30: sparse: expected void const * drivers/char/tpm/tpm_ibmvtpm.c:369:30: sparse: got void [noderef] __iomem *rtce_buf drivers/char/tpm/tpm_ibmvtpm.c:530:43: sparse: got void * drivers/char/tpm/tpm_ibmvtpm.c:537:52: sparse: expected void *ptr drivers/char/tpm/tpm_ibmvtpm.c:537:52: sparse: got void [noderef] __iomem *rtce_buf drivers/char/tpm/tpm_ibmvtpm.c:543:46: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got void [noderef] __iomem *rtce_buf @@ drivers/char/tpm/tpm_ibmvtpm.c:543:46: sparse: expected void const * drivers/char/tpm/tpm_ibmvtpm.c:543:46: sparse: got void [noderef] __iomem *rtce_buf -- drivers/vfio/pci/vfio_pci_nvlink2.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, drivers/vfio/pci/trace.h): include/trace/../../drivers/vfio/pci/trace.h:17:1: sparse: sparse: incorrect type in assignment (different base types) @@ expected int ret @@ got restricted vm_fault_t [usertype] ret @@ include/trace/../../drivers/vfio/pci/trace.h:17:1: sparse: expected int ret include/trace/../../drivers/vfio/pci/trace.h:17:1: sparse: got restricted vm_fault_t [usertype] ret drivers/vfio/pci/vfio_pci_nvlink2.c:76:40: sparse: expected void *to drivers/vfio/pci/vfio_pci_nvlink2.c:81:43: sparse: expected void const *from drivers/vfio/pci/vfio_pci_nvlink2.c:81:43: sparse: got void [noderef] __iomem * vim +/__iomem +130 drivers/char/tpm/tpm_ibmvtpm.c 132f7629474424 Ashley Lai 2012-08-22 94 132f7629474424 Ashley Lai 2012-08-22 95 /** 132f7629474424 Ashley Lai 2012-08-22 96 * tpm_ibmvtpm_recv - Receive data after send 93c12f293f8798 Winkler, Tomas 2016-11-23 97 * 132f7629474424 Ashley Lai 2012-08-22 98 * @chip: tpm chip struct 132f7629474424 Ashley Lai 2012-08-22 99 * @buf: buffer to read 93c12f293f8798 Winkler, Tomas 2016-11-23 100 * @count: size of buffer 132f7629474424 Ashley Lai 2012-08-22 101 * 93c12f293f8798 Winkler, Tomas 2016-11-23 102 * Return: 132f7629474424 Ashley Lai 2012-08-22 103 * Number of bytes read 132f7629474424 Ashley Lai 2012-08-22 104 */ 132f7629474424 Ashley Lai 2012-08-22 105 static int tpm_ibmvtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count) 132f7629474424 Ashley Lai 2012-08-22 106 { 9e0d39d8a6a0a8 Christophe Ricard 2016-03-31 107 struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev); 132f7629474424 Ashley Lai 2012-08-22 108 u16 len; b5666502700855 Ashley Lai 2012-09-12 109 int sig; 132f7629474424 Ashley Lai 2012-08-22 110 132f7629474424 Ashley Lai 2012-08-22 111 if (!ibmvtpm->rtce_buf) { 132f7629474424 Ashley Lai 2012-08-22 112 dev_err(ibmvtpm->dev, "ibmvtpm device is not ready\n"); 132f7629474424 Ashley Lai 2012-08-22 113 return 0; 132f7629474424 Ashley Lai 2012-08-22 114 } 132f7629474424 Ashley Lai 2012-08-22 115 6674ff145eef1f Stefan Berger 2015-12-09 116 sig = wait_event_interruptible(ibmvtpm->wq, !ibmvtpm->tpm_processing_cmd); b5666502700855 Ashley Lai 2012-09-12 117 if (sig) b5666502700855 Ashley Lai 2012-09-12 118 return -EINTR; b5666502700855 Ashley Lai 2012-09-12 119 b5666502700855 Ashley Lai 2012-09-12 120 len = ibmvtpm->res_len; 132f7629474424 Ashley Lai 2012-08-22 121 b5666502700855 Ashley Lai 2012-09-12 122 if (count < len) { 132f7629474424 Ashley Lai 2012-08-22 123 dev_err(ibmvtpm->dev, 37ab03414829e5 Jason Gunthorpe 2013-09-14 124 "Invalid size in recv: count=%zd, crq_size=%d\n", b5666502700855 Ashley Lai 2012-09-12 125 count, len); 132f7629474424 Ashley Lai 2012-08-22 126 return -EIO; 132f7629474424 Ashley Lai 2012-08-22 127 } 132f7629474424 Ashley Lai 2012-08-22 128 132f7629474424 Ashley Lai 2012-08-22 129 spin_lock(&ibmvtpm->rtce_lock); b5666502700855 Ashley Lai 2012-09-12 @130 memcpy((void *)buf, (void *)ibmvtpm->rtce_buf, len); b5666502700855 Ashley Lai 2012-09-12 @131 memset(ibmvtpm->rtce_buf, 0, len); b5666502700855 Ashley Lai 2012-09-12 132 ibmvtpm->res_len = 0; 132f7629474424 Ashley Lai 2012-08-22 133 spin_unlock(&ibmvtpm->rtce_lock); 132f7629474424 Ashley Lai 2012-08-22 134 return len; 132f7629474424 Ashley Lai 2012-08-22 135 } 132f7629474424 Ashley Lai 2012-08-22 136 :::::: The code at line 130 was first introduced by commit :::::: b5666502700855a1eb1a15482005b22478b9460e drivers/char/tpm: remove tasklet and cleanup :::::: TO: Ashley Lai <adlai(a)linux.vnet.ibm.com&gt; :::::: CC: Kent Yoder <key(a)linux.vnet.ibm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org