Re: [PATCH 02/12] bcm2835-dma: Add proper 40-bit DMA support

[kernel test robot <lkp@intel.com>]

Hi Andrea,

kernel test robot noticed the following build warnings:

[auto build test WARNING on vkoul-dmaengine/next]
[also build test WARNING on linus/master v6.8-rc3 next-20240209]
[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/Andrea-della-Porta/bcm2835-dma-Add-support-for-per-channel-flags/20240204-150430
base:   https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next
patch link:    https://lore.kernel.org/r/eeb94204c30c2182f5ffd3ec083c04399ecdee32.1706948717.git.andrea.porta%40suse.com
patch subject: [PATCH 02/12] bcm2835-dma: Add proper 40-bit DMA support
config: arm64-randconfig-r131-20240209 (https://download.01.org/0day-ci/archive/20240209/202402091831.DXlfjVKF-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 7dd790db8b77c4a833c06632e903dc4f13877a64)
reproduce: (https://download.01.org/0day-ci/archive/20240209/202402091831.DXlfjVKF-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402091831.DXlfjVKF-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/dma/bcm2835-dma.c:288:23: sparse: sparse: symbol 'memcpy_parent' was not declared. Should it be static?
>> drivers/dma/bcm2835-dma.c:292:1: sparse: sparse: symbol 'memcpy_lock' was not declared. Should it be static?

vim +/memcpy_parent +288 drivers/dma/bcm2835-dma.c

   276	
   277	#define BCM2711_DMA40_MEMCPY_FLAGS \
   278		(BCM2711_DMA40_QOS(0) | \
   279		 BCM2711_DMA40_PANIC_QOS(0) | \
   280		 BCM2711_DMA40_WAIT_FOR_WRITES | \
   281		 BCM2711_DMA40_DISDEBUG)
   282	
   283	#define BCM2711_DMA40_MEMCPY_XFER_INFO \
   284		(BCM2711_DMA40_SIZE_128 | \
   285		 BCM2711_DMA40_INC | \
   286		 BCM2711_DMA40_BURST_LEN(16))
   287	
 > 288	struct bcm2835_dmadev *memcpy_parent;
   289	static void __iomem *memcpy_chan;
   290	static struct bcm2711_dma40_scb *memcpy_scb;
   291	static dma_addr_t memcpy_scb_dma;
 > 292	DEFINE_SPINLOCK(memcpy_lock);
   293	

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