[sparc]: Add missing const qualifiers to uaccess.h

include/asm-sparc/uaccess.h

@@ -292,9 +292,9 @@ __asm__ __volatile__(							\
 
 extern int __get_user_bad(void);
 
-extern unsigned long __copy_user(void *to, void *from, unsigned long size);
+extern unsigned long __copy_user(void *to, const void *from, unsigned long size);
 
-static inline unsigned long copy_to_user(void __user *to, void *from, unsigned long n)
+static inline unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
 {
 	if (n && __access_ok((unsigned long) to, n))
 		return __copy_user((void *) to, from, n);
@@ -302,12 +302,12 @@ static inline unsigned long copy_to_user(void __user *to, void *from, unsigned l
 		return n;
 }
 
-static inline unsigned long __copy_to_user(void __user *to, void *from, unsigned long n)
+static inline unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n)
 {
 	return __copy_user((void *)to, from, n);
 }
 
-static inline unsigned long copy_from_user(void *to, void __user *from, unsigned long n)
+static inline unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
 {
 	if (n && __access_ok((unsigned long) from, n))
 		return __copy_user(to, (void *) from, n);
@@ -315,7 +315,7 @@ static inline unsigned long copy_from_user(void *to, void __user *from, unsigned
 		return n;
 }
 
-static inline unsigned long __copy_from_user(void *to, void __user *from, unsigned long n)
+static inline unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)
 {
 	return __copy_user(to, (void *)from, n);
 }