tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   4da9f3302615f4191814f826054846bf843e24fa
commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to 
define address spaces
date:   7 weeks ago
config: arc-randconfig-s031-20200805 (attached as .config)
compiler: arc-elf-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: v0.6.2-117-g8c7aee71-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=arc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>


sparse warnings: (new ones prefixed by >>)

   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:819:42: sparse: sparse: cast removes 
address space '__iomem' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:1094:5: sparse: sparse: symbol 
'amdgpu_ttm_gart_bind' was not declared. Should it be static?
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: incorrect 
>> type in initializer (different address spaces) @@     expected void const 
>> [noderef] __user *__p @@     got unsigned int [usertype] * @@
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse:     expected void 
>> const [noderef] __user *__p
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse:     got unsigned 
int [usertype] *
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2353:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c: note: in included file (through 
include/linux/uaccess.h, include/linux/sched/task.h, 
include/linux/sched/signal.h, ...):
   arch/arc/include/asm/uaccess.h:619:33: sparse: sparse: incorrect type in 
initializer (different address spaces) @@     expected unsigned char *d_char @@ 
    got void [noderef] __user *to @@
   arch/arc/include/asm/uaccess.h:619:33: sparse:     expected unsigned char 
*d_char
   arch/arc/include/asm/uaccess.h:619:33: sparse:     got void [noderef] __user 
*to
--
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: incorrect 
>> type in initializer (different address spaces) @@     expected void 
>> [noderef] __user *__p @@     got unsigned int [usertype] * @@
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse:     expected void 
>> [noderef] __user *__p
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse:     got unsigned 
int [usertype] *
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: incorrect 
type in initializer (different address spaces) @@     expected void [noderef] 
__user *__p @@     got unsigned int [usertype] * @@
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse:     expected void 
[noderef] __user *__p
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse:     got unsigned 
int [usertype] *
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast 
removes address space '__user' of expression
--
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:138:17: sparse: sparse: 
incorrect type in initializer (different base types) @@     expected restricted 
__poll_t ( *poll )( ... ) @@     got unsigned int ( * )( ... ) @@
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:138:17: sparse:     expected 
restricted __poll_t ( *poll )( ... )
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:138:17: sparse:     got unsigned 
int ( * )( ... )
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
>> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: 
>> incorrect type in initializer (different address spaces) @@     expected 
>> void [noderef] __user *__p @@     got unsigned int [usertype] * @@
>> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse:     expected 
>> void [noderef] __user *__p
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse:     got unsigned 
int [usertype] *
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:257:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
>> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: 
>> incorrect type in initializer (different address spaces) @@     expected 
>> void const [noderef] __user *__p @@     got unsigned int [usertype] * @@
>> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse:     expected 
>> void const [noderef] __user *__p
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse:     got unsigned 
int [usertype] *
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:259:29: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: 
incorrect type in initializer (different address spaces) @@     expected void 
[noderef] __user *__p @@     got unsigned int [usertype] * @@
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse:     expected 
void [noderef] __user *__p
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse:     got unsigned 
int [usertype] *
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:346:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: 
incorrect type in initializer (different address spaces) @@     expected void 
const [noderef] __user *__p @@     got unsigned int [usertype] * @@
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse:     expected 
void const [noderef] __user *__p
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse:     got unsigned 
int [usertype] *
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:400:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: 
incorrect type in initializer (different address spaces) @@     expected void 
[noderef] __user *__p @@     got unsigned int [usertype] * @@
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse:     expected 
void [noderef] __user *__p
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse:     got unsigned 
int [usertype] *
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:457:21: sparse: sparse: cast 
removes address space '__user' of expression
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:511:21: sparse: sparse: too many 
warnings
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:1256:25: sparse: sparse: 
incompatible types in comparison expression (different address spaces):
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:1256:25: sparse:    struct 
dma_fence [noderef] __rcu *
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:1256:25: sparse:    struct 
dma_fence *
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:1257:17: sparse: sparse: 
incompatible types in comparison expression (different address spaces):
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:1257:17: sparse:    struct 
dma_fence [noderef] __rcu *
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:1257:17: sparse:    struct 
dma_fence *
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:1313:17: sparse: sparse: 
incompatible types in comparison expression (different address spaces):
   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:1313:17: sparse:    struct 
dma_fence [noderef] __rcu *

vim +2353 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

d38ceaf99ed015f Alex Deucher    2015-04-20  2327  
50da51744f005f4 Tom St Denis    2018-05-09  2328  /**
50da51744f005f4 Tom St Denis    2018-05-09  2329   * amdgpu_ttm_vram_write - 
Linear write access to VRAM
50da51744f005f4 Tom St Denis    2018-05-09  2330   *
50da51744f005f4 Tom St Denis    2018-05-09  2331   * Accesses VRAM via MMIO for 
debugging purposes.
50da51744f005f4 Tom St Denis    2018-05-09  2332   */
08cab989f77582c Tom St Denis    2017-08-29  2333  static ssize_t 
amdgpu_ttm_vram_write(struct file *f, const char __user *buf,
08cab989f77582c Tom St Denis    2017-08-29  2334                                
    size_t size, loff_t *pos)
08cab989f77582c Tom St Denis    2017-08-29  2335  {
08cab989f77582c Tom St Denis    2017-08-29  2336        struct amdgpu_device 
*adev = file_inode(f)->i_private;
08cab989f77582c Tom St Denis    2017-08-29  2337        ssize_t result = 0;
08cab989f77582c Tom St Denis    2017-08-29  2338        int r;
08cab989f77582c Tom St Denis    2017-08-29  2339  
08cab989f77582c Tom St Denis    2017-08-29  2340        if (size & 0x3 || *pos 
& 0x3)
08cab989f77582c Tom St Denis    2017-08-29  2341                return -EINVAL;
08cab989f77582c Tom St Denis    2017-08-29  2342  
770d13b19fdf365 Christian König 2018-01-12  2343        if (*pos >= 
adev->gmc.mc_vram_size)
08cab989f77582c Tom St Denis    2017-08-29  2344                return -ENXIO;
08cab989f77582c Tom St Denis    2017-08-29  2345  
08cab989f77582c Tom St Denis    2017-08-29  2346        while (size) {
08cab989f77582c Tom St Denis    2017-08-29  2347                unsigned long 
flags;
08cab989f77582c Tom St Denis    2017-08-29  2348                uint32_t value;
08cab989f77582c Tom St Denis    2017-08-29  2349  
770d13b19fdf365 Christian König 2018-01-12  2350                if (*pos >= 
adev->gmc.mc_vram_size)
08cab989f77582c Tom St Denis    2017-08-29  2351                        return 
result;
08cab989f77582c Tom St Denis    2017-08-29  2352  
08cab989f77582c Tom St Denis    2017-08-29 @2353                r = 
get_user(value, (uint32_t *)buf);
08cab989f77582c Tom St Denis    2017-08-29  2354                if (r)
08cab989f77582c Tom St Denis    2017-08-29  2355                        return 
r;
08cab989f77582c Tom St Denis    2017-08-29  2356  
08cab989f77582c Tom St Denis    2017-08-29  2357                
spin_lock_irqsave(&adev->mmio_idx_lock, flags);
c30572814df55bc Tom St Denis    2017-09-13  2358                
WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
c30572814df55bc Tom St Denis    2017-09-13  2359                
WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31);
c30572814df55bc Tom St Denis    2017-09-13  2360                
WREG32_NO_KIQ(mmMM_DATA, value);
08cab989f77582c Tom St Denis    2017-08-29  2361                
spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
08cab989f77582c Tom St Denis    2017-08-29  2362  
08cab989f77582c Tom St Denis    2017-08-29  2363                result += 4;
08cab989f77582c Tom St Denis    2017-08-29  2364                buf += 4;
08cab989f77582c Tom St Denis    2017-08-29  2365                *pos += 4;
08cab989f77582c Tom St Denis    2017-08-29  2366                size -= 4;
08cab989f77582c Tom St Denis    2017-08-29  2367        }
08cab989f77582c Tom St Denis    2017-08-29  2368  
08cab989f77582c Tom St Denis    2017-08-29  2369        return result;
08cab989f77582c Tom St Denis    2017-08-29  2370  }
08cab989f77582c Tom St Denis    2017-08-29  2371  

:::::: The code at line 2353 was first introduced by commit
:::::: 08cab989f77582cb19df12d4a75a91b68b0017f6 drm/amd/amdgpu: Add write() 
method to VRAM debugfs entry (v2)

:::::: TO: Tom St Denis <tom.stde...@amd.com>
:::::: CC: Alex Deucher <alexander.deuc...@amd.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org

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