[thomas-weissschuh:b4/auxclock-nanosleep 17/44] kernel/time/benchmarks.c:112:40: sparse: sparse: incorrect type in argument 1 (different address spaces)

[thomas-weissschuh:b4/auxclock-nanosleep 17/44] kernel/time/benchmarks.c:112:40: sparse: sparse: incorrect type in argument 1 (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/auxclock-nanosleep
head:   3e5442acb7e21f08c3eff2ecdace624b6647d5b1
commit: 2d4cde60596e5113f58afbb253423ffcabc891ac [17/44] benchmarks
config: i386-randconfig-r131-20260430 (https://download.01.org/0day-ci/archive/20260430/202604301131.MSMUGlNW-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260430/202604301131.MSMUGlNW-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/202604301131.MSMUGlNW-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/time/benchmarks.c:112:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void [noderef] __user *to @@     got char *buf @@
   kernel/time/benchmarks.c:112:40: sparse:     expected void [noderef] __user *to
   kernel/time/benchmarks.c:112:40: sparse:     got char *buf
>> kernel/time/benchmarks.c:119:20: sparse: sparse: incorrect type in initializer (incompatible argument 2 (different address spaces)) @@     expected int ( *read )( ... ) @@     got int ( * )( ... ) @@
   kernel/time/benchmarks.c:119:20: sparse:     expected int ( *read )( ... )
   kernel/time/benchmarks.c:119:20: sparse:     got int ( * )( ... )

vim +112 kernel/time/benchmarks.c

   107	
   108	static ssize_t benchmark_file_read(struct file *f, char *buf, size_t size, loff_t *ppos)
   109	{
   110		struct benchmark_private *private = f->private_data;
   111	
 > 112		return simple_read_from_buffer(buf, size, ppos, private->samples.d, sizeof(private->samples.d));
   113	}
   114	
   115	static const struct file_operations benchmark_fops = {
   116		.owner	 = THIS_MODULE,
   117		.open	 = benchmark_file_open,
   118		.release = benchmark_file_release,
 > 119		.read	 = benchmark_file_read,
   120	};
   121	

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