K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2005-09-15T19:05:37.000000Z
K 7
svn:log
V 545
- Add a new simple facility for marking the current thread as being in a
  state where sleeping on a sleep queue is not allowed.  The facility
  doesn't support recursion but uses a simple private per-thread flag
  (TDP_NOSLEEPING).  The sleepq_add() function will panic if the flag is
  set and INVARIANTS is enabled.
- Use this new facility to replace the g_xup and g_xdown mutexes that were
  (ab)used to achieve similar behavior.
- Disallow sleeping in interrupt threads when invoking interrupt handlers.

MFC after:	1 week
Reviewed by:	phk

END