John Baldwin 87c4a62333 Lock spic(4) and mark it MPSAFE:
- Add a per-softc mutex as a driver lock.
- Use callout(9) instead of timeout(9).
- Set softc pointer in si_drv1 of cdev instead of looking softc
  up via devclass in cdev methods.

Tested by:	no one
2014-11-20 20:24:30 +00:00
..
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