_copy_from_user   121 include/linux/uaccess.h _copy_from_user(void *, const void __user *, unsigned long);
_copy_from_user   144 include/linux/uaccess.h 		n = _copy_from_user(to, from, n);
_copy_from_user    20 lib/usercopy.c EXPORT_SYMBOL(_copy_from_user);