linux-kernel - drivers/video/fbdev/imsttfb.c:1548:20: sparse: sparse: incorrect type in argument 1 (different address spaces)

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Date:   Sun, 28 Aug 2022 13:33:35 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Will Deacon <will@...nel.org>, Christoph Hellwig <hch@....de>,
        Arnd Bergmann <arnd@...db.de>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Subject: drivers/video/fbdev/imsttfb.c:1548:20: sparse: sparse: incorrect
 type in argument 1 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   10d4879f9ef01cc6190fafe4257d06f375bab92c
commit: d803336abdbc1bfacdb32b2cf9f4fdbee072b8ee ARM: mm: kill unused runtime hook arch_iounmap()
date:   9 weeks ago
config: arm-randconfig-s031-20220828 (https://download.01.org/0day-ci/archive/20220828/202208281326.rCI2rkGl-lkp@intel.com/config)
compiler: arm-linux-gnueabi-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=d803336abdbc1bfacdb32b2cf9f4fdbee072b8ee
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d803336abdbc1bfacdb32b2cf9f4fdbee072b8ee
        # 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=arm SHELL=/bin/bash drivers/video/fbdev/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

sparse warnings: (new ones prefixed by >>)
   drivers/video/fbdev/imsttfb.c:1513:30: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/video/fbdev/imsttfb.c:1513:27: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected char [noderef] __iomem *screen_base @@     got unsigned char [usertype] * @@
   drivers/video/fbdev/imsttfb.c:1513:27: sparse:     expected char [noderef] __iomem *screen_base
   drivers/video/fbdev/imsttfb.c:1513:27: sparse:     got unsigned char [usertype] *
   drivers/video/fbdev/imsttfb.c:1522:27: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/video/fbdev/imsttfb.c:1548:20: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *io_addr @@     got unsigned char [usertype] *cmap_regs @@
   drivers/video/fbdev/imsttfb.c:1548:20: sparse:     expected void volatile [noderef] __iomem *io_addr
   drivers/video/fbdev/imsttfb.c:1548:20: sparse:     got unsigned char [usertype] *cmap_regs
   drivers/video/fbdev/imsttfb.c:1360:15: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/video/fbdev/imsttfb.c:1361:16: sparse: sparse: cast removes address space '__iomem' of expression

vim +1548 drivers/video/fbdev/imsttfb.c

^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1540  
48c68c4f1b5424 drivers/video/imsttfb.c Greg Kroah-Hartman 2012-12-21  1541  static void imsttfb_remove(struct pci_dev *pdev)
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1542  {
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1543  	struct fb_info *info = pci_get_drvdata(pdev);
94f9e09ce531d4 drivers/video/imsttfb.c Antonino A. Daplas 2006-01-09  1544  	struct imstt_par *par = info->par;
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1545  	int size = pci_resource_len(pdev, 0);
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1546  
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1547  	unregister_framebuffer(info);
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16 @1548  	iounmap(par->cmap_regs);
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1549  	iounmap(par->dc_regs);
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1550  	iounmap(info->screen_base);
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1551  	release_mem_region(info->fix.smem_start, size);
94f9e09ce531d4 drivers/video/imsttfb.c Antonino A. Daplas 2006-01-09  1552  	framebuffer_release(info);
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1553  }
^1da177e4c3f41 drivers/video/imsttfb.c Linus Torvalds     2005-04-16  1554  

:::::: The code at line 1548 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp