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Drivers controlling devices on which the system may write a kernel
crash dump in the event of a panic can call ddi_in_panic()
to determine if the system is panicking.
When the system is panicking, the calls of functions scheduled by timeout(9F) and ddi_trigger_softintr(9F) will never occur. Neither can delay(9F)
be relied upon, since it is implemented via timeout(9F).
Drivers that need to enforce a time delay such as SCSI bus reset delay time must busy-wait when the system is panicking.
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