tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 11ba468877bb23f28956a35e896356252d63c983 commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 4 weeks ago config: powerpc-randconfig-s032-20200714 (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: v0.6.2-37-gc9676a3b-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=powerpc 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/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1485:13: sparse: sparse: cast removes address space '__user' of expression drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1611:13: sparse: sparse: cast removes address space '__user' of expression drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1613:13: sparse: sparse: cast removes address space '__user' of expression drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1688:13: sparse: sparse: cast removes address space '__user' of expression drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1691:13: sparse: sparse: cast removes address space '__user' of expression drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1738:13: sparse: sparse: cast removes address space '__user' of expression drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1768:59: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __user *uptr @@ got struct vchiq_header *[addressable] header @@ drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1768:59: sparse: expected void [noderef] __user *uptr drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1768:59: sparse: got struct vchiq_header *[addressable] header drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1770:45: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __user *uptr @@ got void *[addressable] service_userdata @@ drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1770:45: sparse: expected void [noderef] __user *uptr drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1770:45: sparse: got void *[addressable] service_userdata drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1772:45: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __user *uptr @@ got void *[addressable] bulk_userdata @@ drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1772:45: sparse: expected void [noderef] __user *uptr drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1772:45: sparse: got void *[addressable] bulk_userdata drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c:1826:13: sparse: sparse: cast removes address space '__user' of expression -- 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 *s drivers/rpmsg/qcom_glink_smem.c:96:47: sparse: got void *fifo vim +/__user +1483 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c 5569a1260933ae Michael Zoran 2017-03-07 1459 5569a1260933ae Michael Zoran 2017-03-07 1460 #define VCHIQ_IOC_CREATE_SERVICE32 \ 5569a1260933ae Michael Zoran 2017-03-07 1461 _IOWR(VCHIQ_IOC_MAGIC, 2, struct vchiq_create_service32) 5569a1260933ae Michael Zoran 2017-03-07 1462 5569a1260933ae Michael Zoran 2017-03-07 1463 static long 5569a1260933ae Michael Zoran 2017-03-07 1464 vchiq_compat_ioctl_create_service( 5569a1260933ae Michael Zoran 2017-03-07 1465 struct file *file, 5569a1260933ae Michael Zoran 2017-03-07 1466 unsigned int cmd, 5569a1260933ae Michael Zoran 2017-03-07 1467 unsigned long arg) 5569a1260933ae Michael Zoran 2017-03-07 1468 { 562943286c7466 Dominic Braun 2018-12-14 1469 struct vchiq_create_service __user *args; 5569a1260933ae Michael Zoran 2017-03-07 1470 struct vchiq_create_service32 __user *ptrargs32 = 5569a1260933ae Michael Zoran 2017-03-07 1471 (struct vchiq_create_service32 __user *)arg; 5569a1260933ae Michael Zoran 2017-03-07 1472 struct vchiq_create_service32 args32; 5569a1260933ae Michael Zoran 2017-03-07 1473 long ret; 5569a1260933ae Michael Zoran 2017-03-07 1474 5569a1260933ae Michael Zoran 2017-03-07 1475 args = compat_alloc_user_space(sizeof(*args)); 5569a1260933ae Michael Zoran 2017-03-07 1476 if (!args) 5569a1260933ae Michael Zoran 2017-03-07 1477 return -EFAULT; 5569a1260933ae Michael Zoran 2017-03-07 1478 ffb99752e93053 Jasminko Dedic 2019-03-25 1479 if (copy_from_user(&args32, ptrargs32, sizeof(args32))) 5569a1260933ae Michael Zoran 2017-03-07 1480 return -EFAULT; 5569a1260933ae Michael Zoran 2017-03-07 1481 5569a1260933ae Michael Zoran 2017-03-07 1482 if (put_user(args32.params.fourcc, &args->params.fourcc) || 5569a1260933ae Michael Zoran 2017-03-07 @1483 put_user(compat_ptr(args32.params.callback), 5569a1260933ae Michael Zoran 2017-03-07 1484 &args->params.callback) || 5569a1260933ae Michael Zoran 2017-03-07 1485 put_user(compat_ptr(args32.params.userdata), 5569a1260933ae Michael Zoran 2017-03-07 1486 &args->params.userdata) || 5569a1260933ae Michael Zoran 2017-03-07 1487 put_user(args32.params.version, &args->params.version) || 5569a1260933ae Michael Zoran 2017-03-07 1488 put_user(args32.params.version_min, 5569a1260933ae Michael Zoran 2017-03-07 1489 &args->params.version_min) || 5569a1260933ae Michael Zoran 2017-03-07 1490 put_user(args32.is_open, &args->is_open) || 5569a1260933ae Michael Zoran 2017-03-07 1491 put_user(args32.is_vchi, &args->is_vchi) || 5569a1260933ae Michael Zoran 2017-03-07 1492 put_user(args32.handle, &args->handle)) 5569a1260933ae Michael Zoran 2017-03-07 1493 return -EFAULT; 5569a1260933ae Michael Zoran 2017-03-07 1494 5569a1260933ae Michael Zoran 2017-03-07 1495 ret = vchiq_ioctl(file, VCHIQ_IOC_CREATE_SERVICE, (unsigned long)args); 5569a1260933ae Michael Zoran 2017-03-07 1496 5569a1260933ae Michael Zoran 2017-03-07 1497 if (ret < 0) 5569a1260933ae Michael Zoran 2017-03-07 1498 return ret; 5569a1260933ae Michael Zoran 2017-03-07 1499 5569a1260933ae Michael Zoran 2017-03-07 1500 if (get_user(args32.handle, &args->handle)) 5569a1260933ae Michael Zoran 2017-03-07 1501 return -EFAULT; 5569a1260933ae Michael Zoran 2017-03-07 1502 5569a1260933ae Michael Zoran 2017-03-07 1503 if (copy_to_user(&ptrargs32->handle, 5569a1260933ae Michael Zoran 2017-03-07 1504 &args32.handle, 5569a1260933ae Michael Zoran 2017-03-07 1505 sizeof(args32.handle))) 5569a1260933ae Michael Zoran 2017-03-07 1506 return -EFAULT; 5569a1260933ae Michael Zoran 2017-03-07 1507 5569a1260933ae Michael Zoran 2017-03-07 1508 return 0; 5569a1260933ae Michael Zoran 2017-03-07 1509 } 5569a1260933ae Michael Zoran 2017-03-07 1510 :::::: The code at line 1483 was first introduced by commit :::::: 5569a1260933ae105acdd50d70decfa868f7c3b5 staging: vchiq_arm: Add compatibility wrappers for ioctls :::::: TO: Michael Zoran <mzoran(a)crowfest.net&gt; :::::: CC: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org