From 603a148f434742fff08273207ffa44176cad13a1 Mon Sep 17 00:00:00 2001
From: Mandeep Singh Baines <msb@google.com>
Date: Sat, 17 Jan 2009 10:31:48 -0800
Subject: [PATCH] softlockup: fix potential race in hung_task when resetting
 timeout

Impact: fix potential false panic

A potential race exists if sysctl_hung_task_timeout_secs is reset to 0
while inside check_hung_uniterruptible_tasks(). If check_task() is
entered, a comparison with 0 will result in a false hung_task being
detected.

If sysctl_hung_task_panic is set, the system will panic.

Signed-off-by: Mandeep Singh Baines <msb@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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