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/20221208110733.5498-3-jacek.lawrynowicz%40linux.intel.com
patch subject: [PATCH v4 2/7] accel/ivpu: Add Intel VPU MMU support
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/d3de15d170d6cfbffbb1b99b0bc650f028719d70
        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 d3de15d170d6cfbffbb1b99b0bc650f028719d70
        # 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_mmu.c: In function 'ivpu_mmu_cmdq_sync':
>> drivers/accel/ivpu/ivpu_mmu.c:442:9: error: implicit declaration of function 'clflush_cache_range'; did you mean 'flush_cache_range'? [-Werror=implicit-function-declaration]
     442 |         clflush_cache_range(q->base, IVPU_MMU_CMDQ_SIZE);
         |         ^~~~~~~~~~~~~~~~~~~
         |         flush_cache_range
   drivers/accel/ivpu/ivpu_mmu.c: In function 'ivpu_mmu_irq_evtq_handler':
   drivers/accel/ivpu/ivpu_mmu.c:822:13: warning: unused variable 'ssid' [-Wunused-variable]
     822 |         u32 ssid;
         |             ^~~~
   cc1: some warnings being treated as errors
--
   drivers/accel/ivpu/ivpu_mmu_context.c: In function 'ivpu_mmu_context_flush_page_tables':
>> drivers/accel/ivpu/ivpu_mmu_context.c:179:25: error: implicit declaration of function 'clflush_cache_range'; did you mean 'flush_cache_range'? [-Werror=implicit-function-declaration]
     179 |                         clflush_cache_range(pte, IVPU_MMU_PGTABLE_SIZE);
         |                         ^~~~~~~~~~~~~~~~~~~
         |                         flush_cache_range
   cc1: some warnings being treated as errors


vim +442 drivers/accel/ivpu/ivpu_mmu.c

   426	
   427	static int ivpu_mmu_cmdq_sync(struct ivpu_device *vdev)
   428	{
   429		struct ivpu_mmu_queue *q = &vdev->mmu->cmdq;
   430		u64 val;
   431		int ret;
   432	
   433		val = FIELD_PREP(IVPU_MMU_CMD_OPCODE, CMD_SYNC) |
   434		      FIELD_PREP(IVPU_MMU_CMD_SYNC_0_CS, 0x2) |
   435		      FIELD_PREP(IVPU_MMU_CMD_SYNC_0_MSH, 0x3) |
   436		      FIELD_PREP(IVPU_MMU_CMD_SYNC_0_MSI_ATTR, 0xf);
   437	
   438		ret = ivpu_mmu_cmdq_cmd_write(vdev, "SYNC", val, 0);
   439		if (ret)
   440			return ret;
   441	
 > 442		clflush_cache_range(q->base, IVPU_MMU_CMDQ_SIZE);
   443		REGV_WR32(MTL_VPU_HOST_MMU_CMDQ_PROD, q->prod);
   444	
   445		ret = ivpu_mmu_cmdq_wait_for_cons(vdev);
   446		if (ret)
   447			ivpu_err(vdev, "Timed out waiting for consumer: %d\n", ret);
   448	
   449		return ret;
   450	}
   451	

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