Hi Laurent,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.7-rc4]
[cannot apply to linuxtv-media/master anholt/for-next next-20200505]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Laurent-Pinchart/Drivers-for-the-BCM283x-CSI-2-CCP2-receiver-and-ISP/20200505-054310
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 9851a0dee7c28514f149f7e4f60ec1b06286cc1b
config: sparc-allyesconfig (attached as .config)
compiler: sparc64-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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=sparc 

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

All errors (new ones prefixed by >>):

   drivers/staging/vc04_services/vc-sm-cma/vc_sm.c: In function 'cache_op_to_func':
   drivers/staging/vc04_services/vc-sm-cma/vc_sm.c:1265:10: error: 'dmac_flush_range' undeclared (first use in this function)
    1265 |   return dmac_flush_range;
         |          ^~~~~~~~~~~~~~~~
   drivers/staging/vc04_services/vc-sm-cma/vc_sm.c:1265:10: note: each undeclared identifier is reported only once for each function it appears in
   drivers/staging/vc04_services/vc-sm-cma/vc_sm.c: At top level:
>> drivers/staging/vc04_services/vc-sm-cma/vc_sm.c:1468:3: error: unknown type name 'compat_uptr_t'
    1468 |   compat_uptr_t start_address;
         |   ^~~~~~~~~~~~~

vim +/compat_uptr_t +1468 drivers/staging/vc04_services/vc-sm-cma/vc_sm.c

  1461	
  1462	#ifdef CONFIG_COMPAT
  1463	struct vc_sm_cma_ioctl_clean_invalid2_32 {
  1464		u32 op_count;
  1465		struct vc_sm_cma_ioctl_clean_invalid_block_32 {
  1466			u16 invalidate_mode;
  1467			u16 block_count;
> 1468			compat_uptr_t start_address;
  1469			u32 block_size;
  1470			u32 inter_block_stride;
  1471		} s[0];
  1472	};
  1473	

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