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Commit 95f9bfc6 authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds
Browse files

tty: Move tty_write_message out of kernel/printk 



This is pure tty code so put it in the tty layer where it can be with the
locking relevant material it uses

Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 452a00d2

drivers/char/tty_io.c

+25 −0
Original line number Diff line number Diff line
@@ -1081,6 +1081,31 @@ static inline ssize_t do_tty_write( 
	return ret;

}



/**

 * tty_write_message - write a message to a certain tty, not just the console.

 * @tty: the destination tty_struct

 * @msg: the message to write

 *

 * This is used for messages that need to be redirected to a specific tty.

 * We don't put it into the syslog queue right now maybe in the future if

 * really needed.

 *

 * We must still hold the BKL and test the CLOSING flag for the moment.

 */



void tty_write_message(struct tty_struct *tty, char *msg)

{

	lock_kernel();

	if (tty) {

		mutex_lock(&tty->atomic_write_lock);

		if (tty->ops->write && !test_bit(TTY_CLOSING, &tty->flags))

			tty->ops->write(tty, msg, strlen(msg));

		tty_write_unlock(tty);

	}

	unlock_kernel();

	return;

}





/**

 *	tty_write		-	write method for tty device file

kernel/printk.c

+0 −16
Original line number Diff line number Diff line
@@ -1291,22 +1291,6 @@ static int __init disable_boot_consoles(void) 
}

late_initcall(disable_boot_consoles);



/**

 * tty_write_message - write a message to a certain tty, not just the console.

 * @tty: the destination tty_struct

 * @msg: the message to write

 *

 * This is used for messages that need to be redirected to a specific tty.

 * We don't put it into the syslog queue right now maybe in the future if

 * really needed.

 */

void tty_write_message(struct tty_struct *tty, char *msg)

{

	if (tty && tty->ops->write)

		tty->ops->write(tty, msg, strlen(msg));

	return;

}



#if defined CONFIG_PRINTK



/*