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* drivers/video/fbdev/s3c2410fb.c:650:17: sparse: sparse: incorrect type in argument 1 (different address spaces)
@ 2021-06-04  3:11 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-06-04  3:11 UTC (permalink / raw)
  To: Linus Walleij
  Cc: kbuild-all, linux-kernel, Russell King, Ard Biesheuvel,
	Abbott Liu, Florian Fainelli

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f88cd3fb9df228e5ce4e13ec3dbad671ddb2146e
commit: 421015713b306e47af95d4d61cdfbd96d462e4cb ARM: 9017/2: Enable KASan for ARM
date:   7 months ago
config: arm-randconfig-s031-20210604 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
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: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=421015713b306e47af95d4d61cdfbd96d462e4cb
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 421015713b306e47af95d4d61cdfbd96d462e4cb
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=arm 

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/video/fbdev/s3c2410fb.c:643:27: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected char [noderef] __iomem *screen_base @@     got void * @@
   drivers/video/fbdev/s3c2410fb.c:643:27: sparse:     expected char [noderef] __iomem *screen_base
   drivers/video/fbdev/s3c2410fb.c:643:27: sparse:     got void *
>> drivers/video/fbdev/s3c2410fb.c:650:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *s @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/s3c2410fb.c:650:17: sparse:     expected void *s
   drivers/video/fbdev/s3c2410fb.c:650:17: sparse:     got char [noderef] __iomem *screen_base
   drivers/video/fbdev/s3c2410fb.c:666:25: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void *cpu_addr @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/s3c2410fb.c:666:25: sparse:     expected void *cpu_addr
   drivers/video/fbdev/s3c2410fb.c:666:25: sparse:     got char [noderef] __iomem *screen_base
   drivers/video/fbdev/s3c2410fb.c:666:25: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void *cpu_addr @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/s3c2410fb.c:666:25: sparse:     expected void *cpu_addr
   drivers/video/fbdev/s3c2410fb.c:666:25: sparse:     got char [noderef] __iomem *screen_base

vim +650 drivers/video/fbdev/s3c2410fb.c

20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  626  
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  627  /*
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  628   * s3c2410fb_map_video_memory():
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  629   *	Allocates the DRAM memory for the frame buffer.  This buffer is
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  630   *	remapped into a non-cached, non-buffered, memory region to
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  631   *	allow palette and pixel writes to occur without flushing the
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  632   *	cache.  Once this area is remapped, all virtual memory
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  633   *	access to the video memory should occur at the new region.
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  634   */
48c68c4f1b5424 drivers/video/s3c2410fb.c       Greg Kroah-Hartman 2012-12-21  635  static int s3c2410fb_map_video_memory(struct fb_info *info)
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  636  {
110c1fa75463c4 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  637  	struct s3c2410fb_info *fbi = info->par;
9fa7bc016a6886 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  638  	dma_addr_t map_dma;
9fa7bc016a6886 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  639  	unsigned map_size = PAGE_ALIGN(info->fix.smem_len);
110c1fa75463c4 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  640  
38a02f560752a8 drivers/video/s3c2410fb.c       Ben Dooks          2008-02-06  641  	dprintk("map_video_memory(fbi=%p) map_size %u\n", fbi, map_size);
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  642  
f6e45661f9be54 drivers/video/fbdev/s3c2410fb.c Luis R. Rodriguez  2016-01-22  643  	info->screen_base = dma_alloc_wc(fbi->dev, map_size, &map_dma,
f6e45661f9be54 drivers/video/fbdev/s3c2410fb.c Luis R. Rodriguez  2016-01-22  644  					 GFP_KERNEL);
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  645  
9fa7bc016a6886 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  646  	if (info->screen_base) {
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  647  		/* prevent initial garbage on screen */
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  648  		dprintk("map_video_memory: clear %p:%08x\n",
9fa7bc016a6886 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  649  			info->screen_base, map_size);
c0d40335353e1c drivers/video/s3c2410fb.c       Ben Dooks          2008-02-06 @650  		memset(info->screen_base, 0x00, map_size);
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  651  
9fa7bc016a6886 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  652  		info->fix.smem_start = map_dma;
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  653  
9fa7bc016a6886 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  654  		dprintk("map_video_memory: dma=%08lx cpu=%p size=%08x\n",
9fa7bc016a6886 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  655  			info->fix.smem_start, info->screen_base, map_size);
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  656  	}
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  657  
9fa7bc016a6886 drivers/video/s3c2410fb.c       Krzysztof Helt     2007-10-16  658  	return info->screen_base ? 0 : -ENOMEM;
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  659  }
20fd5767689124 drivers/video/s3c2410fb.c       Arnaud Patard      2005-09-09  660  

:::::: The code at line 650 was first introduced by commit
:::::: c0d40335353e1c89c9c885e5af4d0be0f1a50483 FB/S3C2410: ensure S3C2410 framebuffer clears initial memory to black

:::::: TO: Ben Dooks <ben-linux@fluff.org>
:::::: CC: Linus Torvalds <torvalds@woody.linux-foundation.org>

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

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