tree:   https://github.com/Freescale/linux-fslc 5.15-2.1.x-imx
head:   c4c56565f9a812fafee843d7a7248f4991a6b709
commit: 371963361b09c8020212056cd797d23dd98a10be [14450/18019] LF-6285-1 npu: ethosu: Add Arm ethos-u driver
config: mips-randconfig-m031-20221206
compiler: mips64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/Freescale/linux-fslc/commit/371963361b09c8020212056cd797d23dd98a10be
        git remote add freescale-fslc https://github.com/Freescale/linux-fslc
        git fetch --no-tags freescale-fslc 5.15-2.1.x-imx
        git checkout 371963361b09c8020212056cd797d23dd98a10be
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/staging/ethosu/

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/staging/ethosu/ethosu_buffer.c: In function 'ethosu_buffer_dma_ranges':
>> drivers/staging/ethosu/ethosu_buffer.c:104:25: error: implicit declaration of function 'of_read_number' [-Werror=implicit-function-declaration]
     104 |                 daddr = of_read_number(&ranges[i], naddr);
         |                         ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/of_read_number +104 drivers/staging/ethosu/ethosu_buffer.c

    59	
    60	/****************************************************************************
    61	 * Functions
    62	 ****************************************************************************/
    63	
    64	/*
    65	 * The 'dma-ranges' device tree property for shared dma memory does not seem
    66	 * to be fully supported for coherent memory. Therefor we apply the DMA range
    67	 * offset ourselves.
    68	 */
    69	static dma_addr_t ethosu_buffer_dma_ranges(struct device *dev,
    70						   dma_addr_t dma_addr,
    71						   size_t dma_buf_size)
    72	{
    73		struct device_node *node = dev->of_node;
    74		const __be32 *ranges;
    75		int len;
    76		int naddr;
    77		int nsize;
    78		int inc;
    79		int i;
    80	
    81		if (!node)
    82			return dma_addr;
    83	
    84		/* Get the #address-cells and #size-cells properties */
    85		naddr = of_n_addr_cells(node);
    86		nsize = of_n_size_cells(node);
    87	
    88		/* Read the 'dma-ranges' property */
    89		ranges = of_get_property(node, "dma-ranges", &len);
    90		if (!ranges || len <= 0)
    91			return dma_addr;
    92	
    93		dev_dbg(dev, "ranges=%p, len=%d, naddr=%d, nsize=%d\n",
    94			ranges, len, naddr, nsize);
    95	
    96		len /= sizeof(*ranges);
    97		inc = naddr + naddr + nsize;
    98	
    99		for (i = 0; (i + inc) <= len; i += inc) {
   100			dma_addr_t daddr;
   101			dma_addr_t paddr;
   102			dma_addr_t size;
   103	
 > 104			daddr = of_read_number(&ranges[i], naddr);
   105			paddr = of_read_number(&ranges[i + naddr], naddr);
   106			size = of_read_number(&ranges[i + naddr + naddr], nsize);
   107	
   108			dev_dbg(dev, "daddr=0x%llx, paddr=0x%llx, size=0x%llx\n",
   109				daddr, paddr, size);
   110	
   111			if (dma_addr >= paddr &&
   112			    (dma_addr + dma_buf_size) < (paddr + size))
   113				return dma_addr + daddr - paddr;
   114		}
   115	
   116		return dma_addr;
   117	}
   118	

-- 
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