X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=kernel%2Fsys.c;h=a87239d9eb706a5fc6713eec00b04112ea87c97e;hb=7172c64a7cee4dfa95864f49c914f7ea8cf497c8;hp=ca7ce522811bbc2cdbff43fb64d3d1a774021ce3;hpb=3967a72a825e44bff5d10f516e90b6f59f59e599;p=linux-2.6.git

diff --git a/kernel/sys.c b/kernel/sys.c
index ca7ce5228..a87239d9e 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1395,7 +1395,6 @@ asmlinkage long sys_setsid(void)
 	pid_t session;
 	int err = -EPERM;
 
-	mutex_lock(&tty_mutex);
 	write_lock_irq(&tasklist_lock);
 
 	/* Fail if I am already a session leader */
@@ -1415,12 +1414,15 @@ asmlinkage long sys_setsid(void)
 
 	group_leader->signal->leader = 1;
 	__set_special_pids(session, session);
+
+	spin_lock(&group_leader->sighand->siglock);
 	group_leader->signal->tty = NULL;
 	group_leader->signal->tty_old_pgrp = 0;
+	spin_unlock(&group_leader->sighand->siglock);
+
 	err = process_group(group_leader);
 out:
 	write_unlock_irq(&tasklist_lock);
-	mutex_unlock(&tty_mutex);
 	return err;
 }