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authorEric W. Biederman <ebiederm@xmission.com>2007-02-12 03:53:00 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 12:48:32 -0500
commitab521dc0f8e117fd808d3e425216864d60390500 (patch)
treef9d6449c4d8c9508fd43edfe845108043e1536b2 /fs
parent3e7cd6c413c9e6fbb5e1ee2acdadb4ababd2d474 (diff)
[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>
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/array.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 70e4fab117b1..07c9cdbcdcac 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -351,7 +351,7 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
351 struct signal_struct *sig = task->signal; 351 struct signal_struct *sig = task->signal;
352 352
353 if (sig->tty) { 353 if (sig->tty) {
354 tty_pgrp = sig->tty->pgrp; 354 tty_pgrp = pid_nr(sig->tty->pgrp);
355 tty_nr = new_encode_dev(tty_devnum(sig->tty)); 355 tty_nr = new_encode_dev(tty_devnum(sig->tty));
356 } 356 }
357 357