TTY: convert more flipping functions

Now, we start converting tty buffer functions to actually use
tty_port. This will allow us to get rid of the need of tty pointer in
many call sites. Only tty_port will be needed and hence no more
tty_port_tty_get calls in those paths.

Now 4 string flipping ones are on turn:
* tty_insert_flip_string_flags
* tty_insert_flip_string_fixed_flag
* tty_prepare_flip_string
* tty_prepare_flip_string_flags

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h
index 78207ca..743f1d0 100644
--- a/include/linux/tty_flip.h
+++ b/include/linux/tty_flip.h
@@ -2,10 +2,14 @@
 #define _LINUX_TTY_FLIP_H
 
 extern int tty_buffer_request_room(struct tty_port *port, size_t size);
-extern int tty_insert_flip_string_flags(struct tty_struct *tty, const unsigned char *chars, const char *flags, size_t size);
-extern int tty_insert_flip_string_fixed_flag(struct tty_struct *tty, const unsigned char *chars, char flag, size_t size);
-extern int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars, size_t size);
-extern int tty_prepare_flip_string_flags(struct tty_struct *tty, unsigned char **chars, char **flags, size_t size);
+extern int tty_insert_flip_string_flags(struct tty_port *port,
+		const unsigned char *chars, const char *flags, size_t size);
+extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
+		const unsigned char *chars, char flag, size_t size);
+extern int tty_prepare_flip_string(struct tty_port *port,
+		unsigned char **chars, size_t size);
+extern int tty_prepare_flip_string_flags(struct tty_port *port,
+		unsigned char **chars, char **flags, size_t size);
 void tty_schedule_flip(struct tty_struct *tty);
 
 static inline int tty_insert_flip_char(struct tty_struct *tty,
@@ -17,12 +21,12 @@
 		tb->char_buf_ptr[tb->used++] = ch;
 		return 1;
 	}
-	return tty_insert_flip_string_flags(tty, &ch, &flag, 1);
+	return tty_insert_flip_string_flags(tty->port, &ch, &flag, 1);
 }
 
 static inline int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, size_t size)
 {
-	return tty_insert_flip_string_fixed_flag(tty, chars, TTY_NORMAL, size);
+	return tty_insert_flip_string_fixed_flag(tty->port, chars, TTY_NORMAL, size);
 }
 
 #endif /* _LINUX_TTY_FLIP_H */