diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h
new file mode 100644
index 0000000..abe9bfc
--- /dev/null
+++ b/include/linux/tty_flip.h
@@ -0,0 +1,35 @@
+#ifndef _LINUX_TTY_FLIP_H
+#define _LINUX_TTY_FLIP_H
+
+#ifdef INCLUDE_INLINE_FUNCS
+#define _INLINE_ extern
+#else
+#define _INLINE_ static __inline__
+#endif
+
+_INLINE_ void tty_insert_flip_char(struct tty_struct *tty,
+				   unsigned char ch, char flag)
+{
+	if (tty->flip.count < TTY_FLIPBUF_SIZE) {
+		tty->flip.count++;
+		*tty->flip.flag_buf_ptr++ = flag;
+		*tty->flip.char_buf_ptr++ = ch;
+	}
+}
+
+_INLINE_ void tty_schedule_flip(struct tty_struct *tty)
+{
+	schedule_delayed_work(&tty->flip.work, 1);
+}
+
+#undef _INLINE_
+
+
+#endif /* _LINUX_TTY_FLIP_H */
+
+
+
+
+
+
+