K 10
svn:author
V 7
rwatson
K 8
svn:date
V 27
2004-03-09T16:31:19.000000Z
K 7
svn:log
V 407
Introduce disc_mtx to protect the global softc list in if_disc.

Since there are two destroy paths for if_disc interfaces --
module unload and cloan interface destroy, create a new utility
function disc_destroy(), which is callded on a softc after it
has been removed from the global softc list; the cloaner and
module unload entry paths will both remove it before calling
disc_destroy().

Reviewed by:	pjd

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