Close a window of time during early boot in which an interrupt would cause a panic.
Close a window of time during early boot in which an interrupt would
cause a panic.

Reported and tested (in another version) by: Jamey Wood <Jamey.Wood@Sun.COM>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase