drivers/gpu/drm/qxl/qxl_object.c:172:29: sparse: sparse: cast removes address space '__iomem' of expression

From: kernel test robot <lkp@intel.com>
To: Thomas Zimmermann <tzimmermann@suse.de>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org
Subject: drivers/gpu/drm/qxl/qxl_object.c:172:29: sparse: sparse: cast removes address space '__iomem' of expression
Date: Thu, 11 Nov 2021 23:44:33 +0800	[thread overview]
Message-ID: <202111112320.wINKak62-lkp@intel.com> (raw)

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   debe436e77c72fcee804fb867f275e6d31aa999c
commit: 49a3f51dfeeecb52c5aa28c5cb9592fe5e39bf95 drm/gem: Use struct dma_buf_map in GEM vmap ops and convert GEM backends
date:   1 year ago
config: riscv-randconfig-s032-20211109 (attached as .config)
compiler: riscv32-linux-gcc (GCC) 11.2.0
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-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=49a3f51dfeeecb52c5aa28c5cb9592fe5e39bf95
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 49a3f51dfeeecb52c5aa28c5cb9592fe5e39bf95
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/ drivers/clk/qcom/ drivers/clocksource/ drivers/firmware/arm_scmi/ drivers/firmware/efi/test/ drivers/gpu/drm/kmb/ drivers/gpu/drm/qxl/ drivers/mmc/host/ drivers/mtd/nand/onenand/ drivers/mtd/nand/raw/ drivers/pci/endpoint/functions/ drivers/phy/marvell/ drivers/pwm/ drivers/soc/bcm/bcm63xx/ drivers/staging/vc04_services/ drivers/uio/ drivers/usb/gadget/function/ drivers/video/fbdev/ fs/ kernel/ lib/

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


sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/qxl/qxl_object.c:172:29: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/qxl/qxl_object.c:198:40: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void * @@     got void [noderef] __iomem * @@
   drivers/gpu/drm/qxl/qxl_object.c:198:40: sparse:     expected void *
   drivers/gpu/drm/qxl/qxl_object.c:198:40: sparse:     got void [noderef] __iomem *
   drivers/gpu/drm/qxl/qxl_object.c:232:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void [noderef] __iomem *vaddr @@     got void *pmap @@
   drivers/gpu/drm/qxl/qxl_object.c:232:33: sparse:     expected void [noderef] __iomem *vaddr
   drivers/gpu/drm/qxl/qxl_object.c:232:33: sparse:     got void *pmap

vim +/__iomem +172 drivers/gpu/drm/qxl/qxl_object.c

   156	
   157	int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map)
   158	{
   159		int r;
   160	
   161		if (bo->kptr) {
   162			bo->map_count++;
   163			goto out;
   164		}
   165		r = ttm_bo_vmap(&bo->tbo, &bo->map);
   166		if (r)
   167			return r;
   168		bo->map_count = 1;
   169	
   170		/* TODO: Remove kptr in favor of map everywhere. */
   171		if (bo->map.is_iomem)
 > 172			bo->kptr = (void *)bo->map.vaddr_iomem;
   173		else
   174			bo->kptr = bo->map.vaddr;
   175	
   176	out:
   177		*map = bo->map;
   178		return 0;
   179	}
   180	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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