[scosu-sched:topic/mmap-cap-prot-wip/v6.18 126/1130] fs/select.c:783:44: error: passing argument 1 of '__get_user_ptr_fn' from incompatible pointer type

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

tree:   https://github.com/scosu/linux-sched topic/mmap-cap-prot-wip/v6.18
head:   f69a5a9d9fee15edde28429e23a4c749a59937bd
commit: 1ab05c9b1f5b7d7f615c289b441e2bf963123a0e [126/1130] [CHERRY-PICK] fs/select: Use get_user_ptr for PCuABI support
config: csky-allmodconfig (https://download.01.org/0day-ci/archive/20260522/202605220144.KSF3718G-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260522/202605220144.KSF3718G-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/202605220144.KSF3718G-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/sched/task.h:13,
                    from include/linux/sched/signal.h:9,
                    from include/linux/rcuwait.h:6,
                    from include/linux/percpu-rwsem.h:7,
                    from include/linux/fs.h:34,
                    from include/linux/compat.h:17,
                    from fs/select.c:18:
   include/linux/uaccess.h:726:9: warning: 'get_user_ptr' redefined
     726 | #define get_user_ptr(x,y) __get_user(x,y)
         |         ^~~~~~~~~~~~
   In file included from arch/csky/include/asm/uaccess.h:201,
                    from include/linux/uaccess.h:12:
   include/asm-generic/uaccess.h:259:9: note: this is the location of the previous definition
     259 | #define get_user_ptr(x, ptr)                                    \
         |         ^~~~~~~~~~~~
   include/linux/uaccess.h:727:9: warning: 'put_user_ptr' redefined
     727 | #define put_user_ptr(x,y) __put_user(x,y)
         |         ^~~~~~~~~~~~
   include/asm-generic/uaccess.h:218:9: note: this is the location of the previous definition
     218 | #define put_user_ptr(x, ptr)                                    \
         |         ^~~~~~~~~~~~
   In file included from include/asm-generic/div64.h:27,
                    from ./arch/csky/include/generated/asm/div64.h:1,
                    from include/linux/math.h:6,
                    from include/linux/math64.h:6,
                    from include/linux/time.h:6,
                    from include/linux/compat.h:10:
   fs/select.c: In function 'get_sigset_argpack':
>> fs/select.c:783:44: error: passing argument 1 of '__get_user_ptr_fn' from incompatible pointer type [-Wincompatible-pointer-types]
     783 |                 unsafe_get_user_ptr(to->p, &from->p, Efault);
         |                                            ^~~~~~~~
         |                                            |
         |                                            sigset_t **
   include/linux/compiler.h:77:45: note: in definition of macro 'unlikely'
      77 | # define unlikely(x)    __builtin_expect(!!(x), 0)
         |                                             ^
   include/linux/uaccess.h:703:36: note: in expansion of macro 'unsafe_op_wrap'
     703 | #define unsafe_get_user_ptr(x,p,e) unsafe_op_wrap(__get_user_ptr(x,p),e)
         |                                    ^~~~~~~~~~~~~~
   include/asm-generic/uaccess.h:254:20: note: in expansion of macro '__get_user_ptr_fn'
     254 |         __gu_err = __get_user_ptr_fn(ptr, &__x);                \
         |                    ^~~~~~~~~~~~~~~~~
   include/linux/uaccess.h:703:51: note: in expansion of macro '__get_user_ptr'
     703 | #define unsafe_get_user_ptr(x,p,e) unsafe_op_wrap(__get_user_ptr(x,p),e)
         |                                                   ^~~~~~~~~~~~~~
   fs/select.c:783:17: note: in expansion of macro 'unsafe_get_user_ptr'
     783 |                 unsafe_get_user_ptr(to->p, &from->p, Efault);
         |                 ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/uaccess.h:279:47: note: expected 'const void **' but argument is of type 'sigset_t **'
     279 | __get_user_ptr_fn(const void __user * __user *ptr,
         |                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~


vim +/__get_user_ptr_fn +783 fs/select.c

   773	
   774	static inline int get_sigset_argpack(struct sigset_argpack *to,
   775					     struct sigset_argpack __user *from)
   776	{
   777		// the path is hot enough for overhead of copy_from_user() to matter
   778		if (from) {
   779			if (can_do_masked_user_access())
   780				from = masked_user_access_begin(from);
   781			else if (!user_read_access_begin(from, sizeof(*from)))
   782				return -EFAULT;
 > 783			unsafe_get_user_ptr(to->p, &from->p, Efault);
   784			unsafe_get_user(to->size, &from->size, Efault);
   785			user_read_access_end();
   786		}
   787		return 0;
   788	Efault:
   789		user_read_access_end();
   790		return -EFAULT;
   791	}
   792	

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