softlockup: remove timestamp checking from hung_task
Impact: saves sizeof(long) bytes per task_struct By guaranteeing that sysctl_hung_task_timeout_secs have elapsed between tasklist scans we can avoid using timestamps. Signed-off-by: NMandeep Singh Baines <msb@google.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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