[linux-next:master 14814/15516] include/linux/regset.h:323:28: sparse: sparse: incorrect type in argument 1 (different address spaces)

[linux-next:master 14814/15516] include/linux/regset.h:323:28: sparse: sparse: incorrect type in argument 1 (different address spaces)

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   d4899e5542c15062cc55cac0ca99025bb64edc61
commit: 5ea75ae6ae60d13dfa35fd5d2e2a81824cba6662 [14814/15516] user_regset_copyout_zero(): use clear_user()
config: sh-randconfig-s031-20200604 (attached as .config)
compiler: sh4-linux-gcc (GCC) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-244-g0ee050a8-dirty
        git checkout 5ea75ae6ae60d13dfa35fd5d2e2a81824cba6662
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=sh CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

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 >>)

>> include/linux/regset.h:323:28: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *addr @@     got void [noderef] <asn:1> *__cl_addr @@
   include/linux/regset.h:323:28: sparse:     expected void *addr
>> include/linux/regset.h:323:28: sparse:     got void [noderef] <asn:1> *__cl_addr

vim +323 include/linux/regset.h

   303	
   304	/*
   305	 * These two parallel the two above, but for portions of a regset layout
   306	 * that always read as all-zero or for which writes are ignored.
   307	 */
   308	static inline int user_regset_copyout_zero(unsigned int *pos,
   309						   unsigned int *count,
   310						   void **kbuf, void __user **ubuf,
   311						   const int start_pos,
   312						   const int end_pos)
   313	{
   314		if (*count == 0)
   315			return 0;
   316		BUG_ON(*pos < start_pos);
   317		if (end_pos < 0 || *pos < end_pos) {
   318			unsigned int copy = (end_pos < 0 ? *count
   319					     : min(*count, end_pos - *pos));
   320			if (*kbuf) {
   321				memset(*kbuf, 0, copy);
   322				*kbuf += copy;
 > 323			} else if (clear_user(*ubuf, copy))
   324				return -EFAULT;
   325			else
   326				*ubuf += copy;
   327			*pos += copy;
   328			*count -= copy;
   329		}
   330		return 0;
   331	}
   332	

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

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