tty: move tty_driver related prototypes to tty_driver.h

We already have tty_driver.h, so cleanup tty.h a bit by moving out
tty_driver-related function prototypes into tty_driver.h.

Note that tty.h already includes tty_driver.h.
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210723103147.18250-2-jslaby@suse.czSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/tty.h

@@ -446,15 +446,6 @@ extern const char *tty_driver_name(const struct tty_struct *tty);
 extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);
 extern void stop_tty(struct tty_struct *tty);
 extern void start_tty(struct tty_struct *tty);
-extern int tty_register_driver(struct tty_driver *driver);
-extern void tty_unregister_driver(struct tty_driver *driver);
-extern struct device *tty_register_device(struct tty_driver *driver,
-					  unsigned index, struct device *dev);
-extern struct device *tty_register_device_attr(struct tty_driver *driver,
-				unsigned index, struct device *device,
-				void *drvdata,
-				const struct attribute_group **attr_grp);
-extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
 extern void tty_write_message(struct tty_struct *tty, char *msg);
 extern int tty_send_xchar(struct tty_struct *tty, char ch);
 extern int tty_put_char(struct tty_struct *tty, unsigned char c);
@@ -691,12 +682,4 @@ extern void tty_lock_slave(struct tty_struct *tty);
 extern void tty_unlock_slave(struct tty_struct *tty);
 extern void tty_set_lock_subclass(struct tty_struct *tty);
 
-#ifdef CONFIG_PROC_FS
-extern void proc_tty_register_driver(struct tty_driver *);
-extern void proc_tty_unregister_driver(struct tty_driver *);
-#else
-static inline void proc_tty_register_driver(struct tty_driver *d) {}
-static inline void proc_tty_unregister_driver(struct tty_driver *d) {}
-#endif
-
 #endif

include/linux/tty_driver.h

@@ -434,4 +434,21 @@ static inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d)
 /* serial subtype definitions */
 #define SERIAL_TYPE_NORMAL	1
 
+int tty_register_driver(struct tty_driver *driver);
+void tty_unregister_driver(struct tty_driver *driver);
+struct device *tty_register_device(struct tty_driver *driver, unsigned index,
+		struct device *dev);
+struct device *tty_register_device_attr(struct tty_driver *driver,
+		unsigned index, struct device *device, void *drvdata,
+		const struct attribute_group **attr_grp);
+void tty_unregister_device(struct tty_driver *driver, unsigned index);
+
+#ifdef CONFIG_PROC_FS
+void proc_tty_register_driver(struct tty_driver *);
+void proc_tty_unregister_driver(struct tty_driver *);
+#else
+static inline void proc_tty_register_driver(struct tty_driver *d) {}
+static inline void proc_tty_unregister_driver(struct tty_driver *d) {}
+#endif
+
 #endif /* #ifdef _LINUX_TTY_DRIVER_H */