commit ab521dc0f8e117fd808d3e425216864d60390500
author Eric W. Biederman <ebiederm@xmission.com> Mon Feb 12 00:53:00 2007 -0800
committer Linus Torvalds <torvalds@woody.linux-foundation.org> Mon Feb 12 09:48:32 2007 -0800
tree f9d6449c4d8c9508fd43edfe845108043e1536b2
parent 3e7cd6c413c9e6fbb5e1ee2acdadb4ababd2d474

[PATCH] tty: update the tty layer to work with struct pid

Of kernel subsystems that work with pids the tty layer is probably the largest
consumer.  But it has the nice virtue that the assiation with a session only
lasts until the session leader exits.  Which means that no reference counting
is required.  So using struct pid winds up being a simple optimization to
avoid hash table lookups.

In the long term the use of pid_nr also ensures that when we have multiple pid
spaces mixed everything will work correctly.

Signed-off-by: Eric W. Biederman <eric@maxwell.lnxi.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>