K 10
svn:author
V 7
attilio
K 8
svn:date
V 27
2008-11-03T20:00:35.390765Z
K 7
svn:log
V 409
Remove the mnt_holdcnt and mnt_holdcntwaiters because they are useless.
Really, the concept of holdcnt in the struct mount is rappresented by
the mnt_ref (which prevents the type-stable structure from being
"recycled) handled through vfs_ref() and vfs_rel().
On this optic, switch the holdcnt acquisition into an emulated vfs_ref()
(and subsequent release into vfs_rel()).

Discussed with:	kib
Tested by:	pho

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