prepare a vnode for reuse
() function prepares the vnode to be
destroyed. The preparation includes the cleaning of all file system specific
data and the removal from its mount point vnode list.
If the vnode has a v_usecount
of zero, and its
flag is not set, it is moved to
the head of the free list as in most cases the vnode is about to be reused, or
its file system is being unmounted.
() function takes an exclusively
locked vnode, and returns with the vnode exclusively locked.
This manual page was written by Chad David