linux-kernel - drivers/remoteproc/xlnx_r5_remoteproc.c:209:20: sparse: sparse: cast removes address space '_

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Date:   Sun, 19 Mar 2023 11:08:30 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tanmay Shah <tanmay.shah@....com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Ben Levinsky <ben.levinsky@....com>
Subject: drivers/remoteproc/xlnx_r5_remoteproc.c:209:20: sparse: sparse: cast
 removes address space '__iomem' of expression

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a3671bd86a9770e34969522d29bb30a1b66fd88a
commit: 6b291e8020a8bd90e94ee13d61f251040425c90d drivers: remoteproc: Add Xilinx r5 remoteproc driver
date:   4 months ago
config: arm64-randconfig-s052-20230319 (https://download.01.org/0day-ci/archive/20230319/202303191110.k1cqaaz4-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6b291e8020a8bd90e94ee13d61f251040425c90d
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 6b291e8020a8bd90e94ee13d61f251040425c90d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/bluetooth/ drivers/remoteproc/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303191110.k1cqaaz4-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/remoteproc/xlnx_r5_remoteproc.c:209:20: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/remoteproc/xlnx_r5_remoteproc.c:315:20: sparse: sparse: cast removes address space '__iomem' of expression

vim +/__iomem +209 drivers/remoteproc/xlnx_r5_remoteproc.c

   190	
   191	/*
   192	 * zynqmp_r5_mem_region_map()
   193	 * @rproc: single R5 core's corresponding rproc instance
   194	 * @mem: mem descriptor to map reserved memory-regions
   195	 *
   196	 * Callback to map va for memory-region's carveout.
   197	 *
   198	 * return 0 on success, otherwise non-zero value on failure
   199	 */
   200	static int zynqmp_r5_mem_region_map(struct rproc *rproc,
   201					    struct rproc_mem_entry *mem)
   202	{
   203		void __iomem *va;
   204	
   205		va = ioremap_wc(mem->dma, mem->len);
   206		if (IS_ERR_OR_NULL(va))
   207			return -ENOMEM;
   208	
 > 209		mem->va = (void *)va;
   210	
   211		return 0;
   212	}
   213	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests