linux-kernel - drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse: sparse: incorrect type in argument 1 (different address spaces)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <202601221514.Fm7yxAFX-lkp@intel.com>
Date: Thu, 22 Jan 2026 15:31:58 +0800
From: kernel test robot <lkp@...el.com>
To: "Thomas Weißschuh" <thomas.weissschuh@...utronix.de>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
 Shuah Khan <skhan@...uxfoundation.org>,
 Johannes Berg <johannes@...solutions.net>,
 David Gow <davidgow@...gle.com>
Subject: drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse:
 sparse: incorrect type in argument 1 (different address spaces)

Hi Thomas,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cf38b2340c0e60ef695b7137440a4d187ed49c88
commit: 031cdd3bc3f369553933c1b0f4cb18000162c8ff kunit: Enable PCI on UML without triggering WARN()
date:   4 months ago
config: um-randconfig-r123-20260120 (https://download.01.org/0day-ci/archive/20260122/202601221514.Fm7yxAFX-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260122/202601221514.Fm7yxAFX-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
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601221514.Fm7yxAFX-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got void *kptr @@
   drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/gpu/drm/loongson/lsdc_benchmark.c:27:35: sparse:     got void *kptr
>> drivers/gpu/drm/loongson/lsdc_benchmark.c:42:51: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got void *kptr @@
   drivers/gpu/drm/loongson/lsdc_benchmark.c:42:51: sparse:     expected void const volatile [noderef] __iomem *addr
   drivers/gpu/drm/loongson/lsdc_benchmark.c:42:51: sparse:     got void *kptr

vim +27 drivers/gpu/drm/loongson/lsdc_benchmark.c

f39db26c54281d Sui Jingfeng 2023-06-15  12  
f39db26c54281d Sui Jingfeng 2023-06-15  13  typedef void (*lsdc_copy_proc_t)(struct lsdc_bo *src_bo,
f39db26c54281d Sui Jingfeng 2023-06-15  14  				 struct lsdc_bo *dst_bo,
f39db26c54281d Sui Jingfeng 2023-06-15  15  				 unsigned int size,
f39db26c54281d Sui Jingfeng 2023-06-15  16  				 int n);
f39db26c54281d Sui Jingfeng 2023-06-15  17  
f39db26c54281d Sui Jingfeng 2023-06-15  18  static void lsdc_copy_gtt_to_vram_cpu(struct lsdc_bo *src_bo,
f39db26c54281d Sui Jingfeng 2023-06-15  19  				      struct lsdc_bo *dst_bo,
f39db26c54281d Sui Jingfeng 2023-06-15  20  				      unsigned int size,
f39db26c54281d Sui Jingfeng 2023-06-15  21  				      int n)
f39db26c54281d Sui Jingfeng 2023-06-15  22  {
f39db26c54281d Sui Jingfeng 2023-06-15  23  	lsdc_bo_kmap(src_bo);
f39db26c54281d Sui Jingfeng 2023-06-15  24  	lsdc_bo_kmap(dst_bo);
f39db26c54281d Sui Jingfeng 2023-06-15  25  
f39db26c54281d Sui Jingfeng 2023-06-15  26  	while (n--)
f39db26c54281d Sui Jingfeng 2023-06-15 @27  		memcpy_toio(dst_bo->kptr, src_bo->kptr, size);
f39db26c54281d Sui Jingfeng 2023-06-15  28  
f39db26c54281d Sui Jingfeng 2023-06-15  29  	lsdc_bo_kunmap(src_bo);
f39db26c54281d Sui Jingfeng 2023-06-15  30  	lsdc_bo_kunmap(dst_bo);
f39db26c54281d Sui Jingfeng 2023-06-15  31  }
f39db26c54281d Sui Jingfeng 2023-06-15  32  
f39db26c54281d Sui Jingfeng 2023-06-15  33  static void lsdc_copy_vram_to_gtt_cpu(struct lsdc_bo *src_bo,
f39db26c54281d Sui Jingfeng 2023-06-15  34  				      struct lsdc_bo *dst_bo,
f39db26c54281d Sui Jingfeng 2023-06-15  35  				      unsigned int size,
f39db26c54281d Sui Jingfeng 2023-06-15  36  				      int n)
f39db26c54281d Sui Jingfeng 2023-06-15  37  {
f39db26c54281d Sui Jingfeng 2023-06-15  38  	lsdc_bo_kmap(src_bo);
f39db26c54281d Sui Jingfeng 2023-06-15  39  	lsdc_bo_kmap(dst_bo);
f39db26c54281d Sui Jingfeng 2023-06-15  40  
f39db26c54281d Sui Jingfeng 2023-06-15  41  	while (n--)
f39db26c54281d Sui Jingfeng 2023-06-15 @42  		memcpy_fromio(dst_bo->kptr, src_bo->kptr, size);
f39db26c54281d Sui Jingfeng 2023-06-15  43  
f39db26c54281d Sui Jingfeng 2023-06-15  44  	lsdc_bo_kunmap(src_bo);
f39db26c54281d Sui Jingfeng 2023-06-15  45  	lsdc_bo_kunmap(dst_bo);
f39db26c54281d Sui Jingfeng 2023-06-15  46  }
f39db26c54281d Sui Jingfeng 2023-06-15  47  

:::::: The code at line 27 was first introduced by commit
:::::: f39db26c54281da6a785259498ca74b5e470476f drm: Add kms driver for loongson display controller

:::::: TO: Sui Jingfeng <suijingfeng@...ngson.cn>
:::::: CC: Sui Jingfeng <suijingfeng@...ngson.cn>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki