John Baldwin d95dca1d08 Add optional entropy harvesting for software interrupts in swi_sched()
as controlled by kern.random.sys.harvest.swi.  SWI harvesting feeds into
the interrupt FIFO and each event is estimated as providing a single bit of
entropy.

Reviewed by:	markm, obrien
MFC after:	2 weeks
2012-09-25 14:55:46 +00:00
..
2012-09-25 03:59:10 +00:00
2012-09-23 08:50:54 +00:00
2012-09-23 19:40:58 +00:00
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2012-09-23 09:13:57 +00:00
2012-09-24 03:14:17 +00:00