linux-kernel - drivers/gpu/drm/ast/ast_mode.c:639:32: sparse: sparse: incorrect type in initializer (different address spaces)

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Message-ID: <202212170111.eInM0unS-lkp@intel.com>
Date:   Sat, 17 Dec 2022 01:12:46 +0800
From:   kernel test robot <lkp@...el.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Jocelyn Falempe <jfalempe@...hat.com>
Subject: drivers/gpu/drm/ast/ast_mode.c:639:32: sparse: sparse: incorrect
 type in initializer (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   71a7507afbc3f27c346898f13ab9bfd918613c34
commit: f2fa5a99ca81ce1056539e83c705f3d6bec62e31 drm/ast: Convert ast to SHMEM
date:   9 weeks ago
config: i386-randconfig-s002
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
        # 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=f2fa5a99ca81ce1056539e83c705f3d6bec62e31
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout f2fa5a99ca81ce1056539e83c705f3d6bec62e31
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 olddefconfig
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/ast/ drivers/gpu/drm/i915/ drivers/misc/habanalabs/common/

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/gpu/drm/ast/ast_mode.c:639:32: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void *vaddr @@     got void [noderef] __iomem *vaddr @@
   drivers/gpu/drm/ast/ast_mode.c:639:32: sparse:     expected void *vaddr
   drivers/gpu/drm/ast/ast_mode.c:639:32: sparse:     got void [noderef] __iomem *vaddr
   drivers/gpu/drm/ast/ast_mode.c:752:19: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/gpu/drm/ast/ast_mode.c:752:16: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected unsigned char [noderef] [usertype] __iomem *dstxor @@     got unsigned char [usertype] * @@
   drivers/gpu/drm/ast/ast_mode.c:752:16: sparse:     expected unsigned char [noderef] [usertype] __iomem *dstxor
   drivers/gpu/drm/ast/ast_mode.c:752:16: sparse:     got unsigned char [usertype] *

vim +639 drivers/gpu/drm/ast/ast_mode.c

   634	
   635	static void ast_handle_damage(struct ast_plane *ast_plane, struct iosys_map *src,
   636				      struct drm_framebuffer *fb,
   637				      const struct drm_rect *clip)
   638	{
 > 639		struct iosys_map dst = IOSYS_MAP_INIT_VADDR(ast_plane->vaddr);
   640	
   641		iosys_map_incr(&dst, drm_fb_clip_offset(fb->pitches[0], fb->format, clip));
   642		drm_fb_memcpy(&dst, fb->pitches, src, fb, clip);
   643	}
   644	

-- 
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