John Baldwin 2a3e25a07f Fixup locking for sf(4) and mark MPSAFE:
- Add locked variants of start, init, and ifmedia_upd.
- Use callout_* instead of timeout/untimeout.
- Don't recurse on the driver lock.
- Fixup locking in ioctl.
- Lock the driver lock in the ifmedia handlers rather than across
  ifmedia_ioctl().

Tested by:	brueffer
MFC after:	3 days
2005-08-18 17:09:16 +00:00
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