drivers/video/fbdev/atafb.c:2457:17: sparse: sparse: cast removes address space '__iomem' of expression

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5fc5768c7ca92895ccd1de94dc521e5a55ae7896
commit: d463633d63e6aa10384683bf39971a4b00780c56 fbdev: atafb: Add support for SuperVidel's SuperBlitter
date:   5 weeks ago
config: m68k-randconfig-r1308-20260926 (https://download.01.org/0day-ci/archive/20260926/202609261313.kgFtkz2t-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 16.1.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260926/202609261313.kgFtkz2t-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
| Fixes: d463633d63e6 ("fbdev: atafb: Add support for SuperVidel's SuperBlitter")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609261313.kgFtkz2t-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/video/fbdev/atafb.c:2824:9: sparse: sparse: switch with no cases
   drivers/video/fbdev/atafb.c:1092:34: sparse: sparse: Using plain integer as NULL pointer
>> drivers/video/fbdev/atafb.c:2457:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/video/fbdev/atafb.c:2641:27: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected char [noderef] __iomem *screen_base @@     got void * @@
   drivers/video/fbdev/atafb.c:2641:27: sparse:     expected char [noderef] __iomem *screen_base
   drivers/video/fbdev/atafb.c:2641:27: sparse:     got void *
   drivers/video/fbdev/atafb.c:2815:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *dst @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/atafb.c:2815:32: sparse:     expected void *dst
   drivers/video/fbdev/atafb.c:2815:32: sparse:     got char [noderef] __iomem *screen_base
   drivers/video/fbdev/atafb.c:3353:38: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *static [toplevel] external_screen_base @@     got void [noderef] __iomem * @@
   drivers/video/fbdev/atafb.c:3353:38: sparse:     expected void *static [toplevel] external_screen_base
   drivers/video/fbdev/atafb.c:3353:38: sparse:     got void [noderef] __iomem *
   drivers/video/fbdev/atafb.c:3424:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got void *static [toplevel] external_screen_base @@
   drivers/video/fbdev/atafb.c:3424:33: sparse:     expected void [noderef] __iomem *addr
   drivers/video/fbdev/atafb.c:3424:33: sparse:     got void *static [toplevel] external_screen_base
   drivers/video/fbdev/atafb.c:3428:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void [noderef] __iomem *addr @@     got void * @@
   drivers/video/fbdev/atafb.c:3428:34: sparse:     expected void [noderef] __iomem *addr
   drivers/video/fbdev/atafb.c:3428:34: sparse:     got void *

vim +/__iomem +2457 drivers/video/fbdev/atafb.c

  2436	
  2437	static void svblit_fillrect(struct fb_info *info,
  2438				    const struct fb_fillrect *rect)
  2439	{
  2440		u32 bytespp = info->var.bits_per_pixel / 8;
  2441		u32 pitch = info->fix.line_length;
  2442		u8 *line;
  2443		u32 pix;
  2444	
  2445		svblit_wait();		/* the CPU is about to touch the fb */
  2446	
  2447		if (rect->rop != ROP_COPY || rect->height <= 1 ||
  2448		    rect->height > 4096) {
  2449			cfb_fillrect(info, rect);
  2450			return;
  2451		}
  2452	
  2453		pix = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
  2454			((u32 *)info->pseudo_palette)[rect->color] : rect->color;
  2455	
  2456		/* draw the first line with the CPU ... */
> 2457		line = (u8 *)info->screen_base + rect->dy * pitch +
  2458		       rect->dx * bytespp;
  2459		switch (bytespp) {
  2460		case 1:
  2461			memset(line, pix, rect->width);
  2462			break;
  2463		case 2:
  2464			memset16((u16 *)line, pix, rect->width);
  2465			break;
  2466		default:
  2467			memset32((u32 *)line, pix, rect->width);
  2468			break;
  2469		}
  2470	
  2471		/* ... and let the blitter replicate it into the other lines */
  2472		svblit_copy(external_addr + rect->dy * pitch + rect->dx * bytespp,
  2473			    external_addr + (rect->dy + 1) * pitch +
  2474			    rect->dx * bytespp,
  2475			    rect->width * bytespp, 0, pitch, rect->height - 1);
  2476	}
  2477	

--
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