Hi Jacek,

I love your patch! Yet something to improve:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on drm-tip/drm-tip next-20221208]
[cannot apply to drm-misc/drm-misc-next linus/master v6.1]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jacek-Lawrynowicz/New-DRM-accel-driver-for-Intel-VPU/20221208-190957
base:   git://anongit.freedesktop.org/drm/drm drm-next
patch link:    https://lore.kernel.org/r/20221208110733.5498-4-jacek.lawrynowicz%40linux.intel.com
patch subject: [PATCH v4 3/7] accel/ivpu: Add GEM buffer object management
config: um-allyesconfig
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/2ff7136d04f23c633714051c55b59631bc5b733d
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jacek-Lawrynowicz/New-DRM-accel-driver-for-Intel-VPU/20221208-190957
        git checkout 2ff7136d04f23c633714051c55b59631bc5b733d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/accel/ivpu/ivpu_gem.c: In function 'shmem_alloc_pages_locked':
>> drivers/accel/ivpu/ivpu_gem.c:85:17: error: implicit declaration of function 'set_pages_array_wc' [-Werror=implicit-function-declaration]
      85 |                 set_pages_array_wc(pages, npages);
         |                 ^~~~~~~~~~~~~~~~~~
>> drivers/accel/ivpu/ivpu_gem.c:87:17: error: implicit declaration of function 'set_pages_array_uc' [-Werror=implicit-function-declaration]
      87 |                 set_pages_array_uc(pages, npages);
         |                 ^~~~~~~~~~~~~~~~~~
   drivers/accel/ivpu/ivpu_gem.c: In function 'shmem_free_pages_locked':
>> drivers/accel/ivpu/ivpu_gem.c:96:17: error: implicit declaration of function 'set_pages_array_wb' [-Werror=implicit-function-declaration]
      96 |                 set_pages_array_wb(bo->pages, bo->base.size >> PAGE_SHIFT);
         |                 ^~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/set_pages_array_wc +85 drivers/accel/ivpu/ivpu_gem.c

    74	
    75	static int __must_check shmem_alloc_pages_locked(struct ivpu_bo *bo)
    76	{
    77		int npages = bo->base.size >> PAGE_SHIFT;
    78		struct page **pages;
    79	
    80		pages = drm_gem_get_pages(&bo->base);
    81		if (IS_ERR(pages))
    82			return PTR_ERR(pages);
    83	
    84		if (bo->flags & DRM_IVPU_BO_WC)
  > 85			set_pages_array_wc(pages, npages);
    86		else if (bo->flags & DRM_IVPU_BO_UNCACHED)
  > 87			set_pages_array_uc(pages, npages);
    88	
    89		bo->pages = pages;
    90		return 0;
    91	}
    92	
    93	static void shmem_free_pages_locked(struct ivpu_bo *bo)
    94	{
    95		if (ivpu_bo_cache_mode(bo) != DRM_IVPU_BO_CACHED)
  > 96			set_pages_array_wb(bo->pages, bo->base.size >> PAGE_SHIFT);
    97	
    98		drm_gem_put_pages(&bo->base, bo->pages, true, false);
    99		bo->pages = NULL;
   100	}
   101	

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