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Commit ed617e44 authored by Peter Hurley's avatar Peter Hurley Committed by Greg Kroah-Hartman
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tty: Document locking for tty driver methods 



The tty core calls the tty driver's open, close and hangup
methods holding the tty lock.

Signed-off-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ed9891bf

include/linux/tty_driver.h

+5 −3
Original line number Diff line number Diff line
@@ -35,14 +35,14 @@ 
 * 	This routine is mandatory; if this routine is not filled in,

 * 	the attempted open will fail with ENODEV.

 *

 *	Required method.

 *	Required method. Called with tty lock held.

 *

 * void (*close)(struct tty_struct * tty, struct file * filp);

 *

 * 	This routine is called when a particular tty device is closed.

 *	Note: called even if the corresponding open() failed.

 *

 *	Required method.

 *	Required method. Called with tty lock held.

 *

 * void (*shutdown)(struct tty_struct * tty);

 *
@@ -172,6 +172,8 @@ 
 *

 *	Optional:

 *

 *	Called with tty lock held.

 *

 * int (*break_ctl)(struct tty_struct *tty, int state);

 *

 * 	This optional routine requests the tty driver to turn on or