Alan Cox c65c9bc3ef tty: rewrite the ldisc locking ... There are several pretty much unfixable races in the old ldisc code, especially with respect to pty behaviour and also to hangup. It's easier to rewrite the code than simply try and patch it up. This patch - splits the ldisc from the tty (so we will be able to refcount it more cleanly later) - introduces a mutex lock for ldisc changing on an active device - fixes the complete mess that hangup caused - implements hopefully correct setldisc/close/hangup locking There are still some problems around pty pairs that have always been there but at least it is now possible to understand the code and fix further problems. This fixes the following known bugs - hang up can leak ldisc references - hang up may not call open/close on ldisc in a matched way - pty/tty pairs can deadlock during an ldisc change - reading the ldisc proc files can cause every ldisc to be loaded and probably a few other of the mysterious ldisc race reports. I'm sure it also adds the odd new one. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-06-11 08:51:01 -07:00
..
i2cmd.c	[PATCH] ip2main.c warning fixes	2006-02-03 08:32:10 -08:00
i2cmd.h	[PATCH] char: ip2 remove broken macro	2006-12-07 08:39:43 -08:00
i2ellis.c	ip2: init/deinit cleanup	2008-10-13 09:51:39 -07:00
i2ellis.h	ip2: init/deinit cleanup	2008-10-13 09:51:39 -07:00
i2hw.h	Char: ip2, macros cleanup	2008-04-30 08:29:44 -07:00
i2lib.c	tty: rewrite the ldisc locking	2009-06-11 08:51:01 -07:00
i2lib.h	[PATCH] i2Output always takes kernel data now	2006-10-11 11:17:07 -07:00
i2pack.h
ip2.h
ip2ioctl.h
ip2main.c	tty: rewrite the ldisc locking	2009-06-11 08:51:01 -07:00
ip2trace.h
ip2types.h
Makefile	Char: merge ip2main and ip2base	2008-10-13 09:51:39 -07:00