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authorFrederic Weisbecker <fweisbec@gmail.com>2009-02-10 16:52:37 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-11 11:04:16 +0100
commitcf2592f59c0e8ed4308adbdb2e0a88655379d579 (patch)
tree383b30bc13af8ce83e15825b041d8bb791ea4cea /drivers/usb/host/whci/int.c
parent17406b82d621930cca8ccc1272cdac9a7dae8e40 (diff)
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softlockup: ensure the task has been switched out once
When we check if a task has been switched out since the last scan, we might have a race condition on the following scenario: - the task is freshly created and scheduled - it puts its state to TASK_UNINTERRUPTIBLE and is not yet switched out - check_hung_task() scans this task and will report a false positive because t->nvcsw + t->nivcsw == t->last_switch_count == 0 Add a check for such cases. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Mandeep Singh Baines <msb@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/usb/host/whci/int.c')
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