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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 /drivers/char/vt.c
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 'drivers/char/vt.c')
-rw-r--r--drivers/char/vt.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index d6694163b6f1..94ce3e7fc9e4 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -866,8 +866,8 @@ int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
866 ws.ws_col = vc->vc_cols; 866 ws.ws_col = vc->vc_cols;
867 ws.ws_ypixel = vc->vc_scan_lines; 867 ws.ws_ypixel = vc->vc_scan_lines;
868 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) && 868 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
869 vc->vc_tty->pgrp > 0) 869 vc->vc_tty->pgrp)
870 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1); 870 kill_pgrp(vc->vc_tty->pgrp, SIGWINCH, 1);
871 *cws = ws; 871 *cws = ws;
872 } 872 }
873 873