From 10622edfde1dfb8717b43727828e651df45c5498 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 21 Sep 2011 19:57:12 +0200
Subject: signal-revert-ptrace-preempt-magic.patch

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/kernel/signal.c b/kernel/signal.c
index ded28b9..8ed7287 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1908,15 +1908,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, siginfo_t *info)
 		if (gstop_done && ptrace_reparented(current))
 			do_notify_parent_cldstop(current, false, why);
 
-		/*
-		 * Don't want to allow preemption here, because
-		 * sys_ptrace() needs this task to be inactive.
-		 *
-		 * XXX: implement read_unlock_no_resched().
-		 */
-		preempt_disable();
 		read_unlock(&tasklist_lock);
-		preempt_enable_no_resched();
 		freezable_schedule();
 	} else {
 		/*
-- 
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