commit 603a148f434742fff08273207ffa44176cad13a1
author Mandeep Singh Baines <msb@google.com> Sat Jan 17 10:31:48 2009 -0800
committer Ingo Molnar <mingo@elte.hu> Sun Jan 18 19:20:17 2009 +0100
tree e0c051efd07a7b51390e13169f4c78a29c676fc1
parent af432eb1cc3178ec7109aca2283aafb1c12ccac1

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>