long strncpy_from_user(char *dst, const char __user *src, long count);
long strnlen_user(const char __user *src, long n);
-unsigned long clear_user(void __user *to, unsigned long n);
+unsigned long __clear_user(void __user *to, unsigned long n);
+
+#define clear_user __clear_user
#define strlen_user(str) strnlen_user(str, 32767)