[PATCH] Revert "tty: split the lock up a bit further"

[Ingo Molnar]

This reverts commit 36ba782e9674cdc29ec7003757df0b375e99fa96.

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 684f0e0..a19fef2 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -516,8 +516,6 @@ static void do_tty_hangup(struct work_struct *work)
 	/* inuse_filps is protected by the single kernel lock */
 	lock_kernel();
 	check_tty_count(tty, "do_tty_hangup");
-	unlock_kernel();
-
 	file_list_lock();
 	/* This breaks for file handles being sent over AF_UNIX sockets ? */
 	list_for_each_entry(filp, &tty->tty_files, f_u.fu_list) {
@@ -531,7 +529,6 @@ static void do_tty_hangup(struct work_struct *work)
 	}
 	file_list_unlock();
 
-	lock_kernel();
 	tty_ldisc_hangup(tty);
 
 	read_lock(&tasklist_lock);

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