openrisc: uaccess: Fix sparse address space warnings

The OpenRISC user access functions put_user(), get_user() and
clear_user() were missing proper sparse annotations.  This generated
warnings like the below.

This patch adds the annotations to fix the warnings.

Example warnings:

net/ipv4/ip_sockglue.c:759:29: warning: incorrect type in argument 1 (different address spaces)
net/ipv4/ip_sockglue.c:759:29:    expected void const volatile [noderef] __user *
net/ipv4/ip_sockglue.c:759:29:    got int const *__gu_addr
net/ipv4/ip_sockglue.c:764:29: warning: incorrect type in initializer (different address spaces)
net/ipv4/ip_sockglue.c:764:29:    expected unsigned char const *__gu_addr
net/ipv4/ip_sockglue.c:764:29:    got unsigned char [noderef] __user *

Signed-off-by: Stafford Horne <shorne@gmail.com>
Reviewed-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>

Author: stffrdhrn

arch/openrisc/include/asm/uaccess.h

@@ -100,7 +100,7 @@ extern long __put_user_bad(void);
 #define __put_user_check(x, ptr, size)					\
 ({									\
 	long __pu_err = -EFAULT;					\
-	__typeof__(*(ptr)) *__pu_addr = (ptr);				\
+	__typeof__(*(ptr)) __user *__pu_addr = (ptr);			\
 	if (access_ok(__pu_addr, size))			\
 		__put_user_size((x), __pu_addr, (size), __pu_err);	\
 	__pu_err;							\
@@ -173,7 +173,7 @@ struct __large_struct {
 #define __get_user_check(x, ptr, size)					\
 ({									\
 	long __gu_err = -EFAULT, __gu_val = 0;				\
-	const __typeof__(*(ptr)) * __gu_addr = (ptr);			\
+	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
 	if (access_ok(__gu_addr, size))			\
 		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
 	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
@@ -248,10 +248,10 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long size)
 #define INLINE_COPY_FROM_USER
 #define INLINE_COPY_TO_USER
 
-extern unsigned long __clear_user(void *addr, unsigned long size);
+extern unsigned long __clear_user(void __user *addr, unsigned long size);
 
 static inline __must_check unsigned long
-clear_user(void *addr, unsigned long size)
+clear_user(void __user *addr, unsigned long size)
 {
 	if (likely(access_ok(addr, size)))
 		size = __clear_user(addr, size);