Poul-Henning Kamp a2fb4feded Fix the spechash lock order reversal by keeping an updated sum
of v_usecount in the dev_t which vcount() can return without
locking any vnodes.

Seen by:	jhb
2002-10-24 19:38:56 +00:00
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2002-10-22 17:32:27 +00:00
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