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@@ -521,6 +521,8 @@ extern int tty_port_close_start(struct tty_port *port,
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extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
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extern void tty_port_close(struct tty_port *port,
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struct tty_struct *tty, struct file *filp);
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+extern int tty_port_install(struct tty_port *port, struct tty_driver *driver,
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+ struct tty_struct *tty);
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extern int tty_port_open(struct tty_port *port,
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struct tty_struct *tty, struct file *filp);
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static inline int tty_port_users(struct tty_port *port)
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