Commit 572b9adb authored by Rodolfo Giometti's avatar Rodolfo Giometti Committed by Linus Torvalds
Browse files

ldisc n_tty: add new method n_tty_inherit_ops() 



This new method can be used to init a new struct tty_ldisc_ops as the
default tty_ldisc_N_TTY struct.

Signed-off-by: default avatarRodolfo Giometti <giometti@linux.it>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b3e63afe

drivers/char/n_tty.c

+17 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ 
#include <linux/audit.h>

#include <linux/file.h>

#include <linux/uaccess.h>

#include <linux/module.h>



#include <asm/system.h>
@@ -2091,3 +2092,19 @@ struct tty_ldisc_ops tty_ldisc_N_TTY = { 
	.receive_buf     = n_tty_receive_buf,

	.write_wakeup    = n_tty_write_wakeup

};



/**

 *	n_tty_inherit_ops	-	inherit N_TTY methods

 *	@ops: struct tty_ldisc_ops where to save N_TTY methods

 *

 *	Used by a generic struct tty_ldisc_ops to easily inherit N_TTY

 *	methods.

 */



void n_tty_inherit_ops(struct tty_ldisc_ops *ops)

{

	*ops = tty_ldisc_N_TTY;

	ops->owner = NULL;

	ops->refcount = ops->flags = 0;

}

EXPORT_SYMBOL_GPL(n_tty_inherit_ops);

include/linux/tty.h

+1 −0
Original line number Diff line number Diff line
@@ -514,6 +514,7 @@ extern void tty_ldisc_enable(struct tty_struct *tty); 


/* n_tty.c */

extern struct tty_ldisc_ops tty_ldisc_N_TTY;

extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops);



/* tty_audit.c */

#ifdef CONFIG_AUDIT