Softdep_fsync() may need to lock parent directory of the synced vnode. Use inlined (due to FFSV_FORCEINSMQ) version of vn_vget_ino() to prevent mountpoint from being unmounted and freed while no vnodes are locked.
Softdep_fsync() may need to lock parent directory of the synced vnode.
Use inlined (due to FFSV_FORCEINSMQ) version of vn_vget_ino() to prevent
mountpoint from being unmounted and freed while no vnodes are locked.

Tested by:	pho
Approved by:	re (kensmith)
MFC after:	1 month

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