disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/tty.h
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@@ -18,30 +18,6 @@
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 /*
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- * Lock subclasses for tty locks
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- *
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- * TTY_LOCK_NORMAL is for normal ttys and master ptys.
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- * TTY_LOCK_SLAVE is for slave ptys only.
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- *
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- * Lock subclasses are necessary for handling nested locking with pty pairs.
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- * tty locks which use nested locking:
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- *
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- * legacy_mutex - Nested tty locks are necessary for releasing pty pairs.
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- *		  The stable lock order is master pty first, then slave pty.
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- * termios_rwsem - The stable lock order is tty_buffer lock->termios_rwsem.
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- *		   Subclassing this lock enables the slave pty to hold its
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- *		   termios_rwsem when claiming the master tty_buffer lock.
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- * tty_buffer lock - slave ptys can claim nested buffer lock when handling
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- *		     signal chars. The stable lock order is slave pty, then
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- *		     master.
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- */
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-
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-enum {
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-	TTY_LOCK_NORMAL = 0,
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-	TTY_LOCK_SLAVE,
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-};
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-
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-/*
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  * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
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  * hardcoded at present.)
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  */
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@@ -386,21 +362,6 @@
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 #define TTY_LDISC_CHANGING	20	/* Change pending - non-block IO */
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 #define TTY_LDISC_HALTED	22	/* Line discipline is halted */
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-/* Values for tty->flow_change */
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-#define TTY_THROTTLE_SAFE 1
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-#define TTY_UNTHROTTLE_SAFE 2
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-
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-static inline void __tty_set_flow_change(struct tty_struct *tty, int val)
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-{
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-	tty->flow_change = val;
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-}
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-
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-static inline void tty_set_flow_change(struct tty_struct *tty, int val)
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-{
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-	tty->flow_change = val;
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-	smp_mb();
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-}
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-
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 static inline bool tty_io_nonblock(struct tty_struct *tty, struct file *file)
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 {
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 	return file->f_flags & O_NONBLOCK ||
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@@ -431,9 +392,6 @@
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 extern struct tty_struct *tty_kopen(dev_t device);
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 extern void tty_kclose(struct tty_struct *tty);
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 extern int tty_dev_name_to_number(const char *name, dev_t *number);
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-extern int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout);
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-extern void tty_ldisc_unlock(struct tty_struct *tty);
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-extern ssize_t redirected_tty_write(struct kiocb *, struct iov_iter *);
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 #else
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 static inline void tty_kref_put(struct tty_struct *tty)
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 { }
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@@ -486,11 +444,7 @@
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 extern const char *tty_driver_name(const struct tty_struct *tty);
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 extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);
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-extern int __tty_check_change(struct tty_struct *tty, int sig);
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-extern int tty_check_change(struct tty_struct *tty);
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-extern void __stop_tty(struct tty_struct *tty);
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 extern void stop_tty(struct tty_struct *tty);
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-extern void __start_tty(struct tty_struct *tty);
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 extern void start_tty(struct tty_struct *tty);
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 extern int tty_register_driver(struct tty_driver *driver);
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 extern int tty_unregister_driver(struct tty_driver *driver);
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@@ -515,23 +469,11 @@
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 extern int is_current_pgrp_orphaned(void);
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 extern void tty_hangup(struct tty_struct *tty);
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 extern void tty_vhangup(struct tty_struct *tty);
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-extern void tty_vhangup_session(struct tty_struct *tty);
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 extern int tty_hung_up_p(struct file *filp);
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 extern void do_SAK(struct tty_struct *tty);
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 extern void __do_SAK(struct tty_struct *tty);
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-extern void tty_open_proc_set_tty(struct file *filp, struct tty_struct *tty);
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-extern int tty_signal_session_leader(struct tty_struct *tty, int exit_session);
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-extern void session_clear_tty(struct pid *session);
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 extern void no_tty(void);
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-extern void tty_buffer_free_all(struct tty_port *port);
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-extern void tty_buffer_flush(struct tty_struct *tty, struct tty_ldisc *ld);
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-extern void tty_buffer_init(struct tty_port *port);
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-extern void tty_buffer_set_lock_subclass(struct tty_port *port);
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-extern bool tty_buffer_restart_work(struct tty_port *port);
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-extern bool tty_buffer_cancel_work(struct tty_port *port);
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-extern void tty_buffer_flush_work(struct tty_port *port);
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 extern speed_t tty_termios_baud_rate(struct ktermios *termios);
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-extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
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 extern void tty_termios_encode_baud_rate(struct ktermios *termios,
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 						speed_t ibaud, speed_t obaud);
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 extern void tty_encode_baud_rate(struct tty_struct *tty,
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@@ -559,35 +501,22 @@
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 extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
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 extern void tty_ldisc_deref(struct tty_ldisc *);
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 extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);
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-extern void tty_ldisc_hangup(struct tty_struct *tty, bool reset);
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-extern int tty_ldisc_reinit(struct tty_struct *tty, int disc);
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 extern const struct seq_operations tty_ldiscs_seq_ops;
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 extern void tty_wakeup(struct tty_struct *tty);
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 extern void tty_ldisc_flush(struct tty_struct *tty);
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-extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
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 extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
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 			unsigned int cmd, unsigned long arg);
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-extern long tty_jobctrl_ioctl(struct tty_struct *tty, struct tty_struct *real_tty,
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-			      struct file *file, unsigned int cmd, unsigned long arg);
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 extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);
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-extern void tty_default_fops(struct file_operations *fops);
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-extern struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx);
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-extern int tty_alloc_file(struct file *file);
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-extern void tty_add_file(struct tty_struct *tty, struct file *file);
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-extern void tty_free_file(struct file *file);
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 extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx);
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 extern void tty_release_struct(struct tty_struct *tty, int idx);
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-extern int tty_release(struct inode *inode, struct file *filp);
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 extern void tty_init_termios(struct tty_struct *tty);
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 extern void tty_save_termios(struct tty_struct *tty);
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 extern int tty_standard_install(struct tty_driver *driver,
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 		struct tty_struct *tty);
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 extern struct mutex tty_mutex;
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-
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-#define tty_is_writelocked(tty)  (mutex_is_locked(&tty->atomic_write_lock))
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 extern void tty_port_init(struct tty_port *port);
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 extern void tty_port_link_device(struct tty_port *port,
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@@ -726,10 +655,6 @@
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 extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
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 extern int tty_unregister_ldisc(int disc);
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 extern int tty_set_ldisc(struct tty_struct *tty, int disc);
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-extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
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-extern void tty_ldisc_release(struct tty_struct *tty);
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-extern int __must_check tty_ldisc_init(struct tty_struct *tty);
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-extern void tty_ldisc_deinit(struct tty_struct *tty);
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 extern int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
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 				 char *f, int count);
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@@ -743,20 +668,10 @@
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 /* tty_audit.c */
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 #ifdef CONFIG_AUDIT
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-extern void tty_audit_add_data(struct tty_struct *tty, const void *data,
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-			       size_t size);
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 extern void tty_audit_exit(void);
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 extern void tty_audit_fork(struct signal_struct *sig);
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-extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
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 extern int tty_audit_push(void);
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 #else
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-static inline void tty_audit_add_data(struct tty_struct *tty, const void *data,
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-				      size_t size)
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-{
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-}
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-static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
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-{
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-}
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 static inline void tty_audit_exit(void)
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 {
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 }
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@@ -797,17 +712,5 @@
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 static inline void proc_tty_register_driver(struct tty_driver *d) {}
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 static inline void proc_tty_unregister_driver(struct tty_driver *d) {}
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 #endif
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-
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-#define tty_msg(fn, tty, f, ...) \
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-	fn("%s %s: " f, tty_driver_name(tty), tty_name(tty), ##__VA_ARGS__)
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-
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-#define tty_debug(tty, f, ...)	tty_msg(pr_debug, tty, f, ##__VA_ARGS__)
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-#define tty_info(tty, f, ...)	tty_msg(pr_info, tty, f, ##__VA_ARGS__)
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-#define tty_notice(tty, f, ...)	tty_msg(pr_notice, tty, f, ##__VA_ARGS__)
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-#define tty_warn(tty, f, ...)	tty_msg(pr_warn, tty, f, ##__VA_ARGS__)
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-#define tty_err(tty, f, ...)	tty_msg(pr_err, tty, f, ##__VA_ARGS__)
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-
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-#define tty_info_ratelimited(tty, f, ...) \
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-		tty_msg(pr_info_ratelimited, tty, f, ##__VA_ARGS__)
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 #endif