[openeuler:OLK-6.6 3482/3482] drivers/misc/zcopy/zcopy.c:621:51: sparse: sparse: incorrect type in argument 2 (different address spaces)

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

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   4b48fa45408a2757255bdd0c640c1f693b424fe4
commit: 0305a09f222b7b94b01e478948f09ef95e9afda2 [3482/3482] zcopy: Introduce the pageattach interface
config: arm64-randconfig-r111-20251206 (https://download.01.org/0day-ci/archive/20251208/202512080059.AtMf7DsU-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251208/202512080059.AtMf7DsU-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512080059.AtMf7DsU-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/misc/zcopy/zcopy.c:621:51: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void const [noderef] __user *from @@     got void * @@
   drivers/misc/zcopy/zcopy.c:621:51: sparse:     expected void const [noderef] __user *from
   drivers/misc/zcopy/zcopy.c:621:51: sparse:     got void *

vim +621 drivers/misc/zcopy/zcopy.c

   611	
   612	static long zcopy_ioctl(struct file *file, unsigned int type, unsigned long ptr)
   613	{
   614		long ret = 0;
   615	
   616		switch (type) {
   617		case IO_ATTACH:
   618		{
   619			struct zcopy_ioctl_pswap ctx;
   620	
 > 621			if (copy_from_user((void *)&ctx, (void *)ptr,
   622									sizeof(struct zcopy_ioctl_pswap))) {
   623				ret = -EFAULT;
   624				break;
   625			}
   626			ret = attach_pages(ctx.dst_addr, ctx.src_addr, ctx.dst_pid,
   627						ctx.src_pid, ctx.size);
   628			break;
   629		}
   630		default:
   631			break;
   632		}
   633	
   634		return ret;
   635	}
   636	

-- 
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