vnode interface conversion

vnode interface conversion

SCCS-vsn: sys/vm/swap_pager.c 7.9
SCCS-vsn: sys/vm/vm_swap.c 7.22
SCCS-vsn: sys/vm/vnode_pager.c 7.10
SCCS-vsn: sys/dev/vn.c 7.10
SCCS-vsn: sys/hp/hpux/hpux_compat.c 7.20
SCCS-vsn: sys/ufs/ffs/ffs_alloc.c 7.34
SCCS-vsn: sys/ufs/ffs/ffs_balloc.c 7.19
SCCS-vsn: sys/ufs/ffs/ffs_inode.c 7.51
SCCS-vsn: sys/ufs/ffs/ffs_subr.c 7.18
SCCS-vsn: sys/ufs/ffs/ffs_vfsops.c 7.65
SCCS-vsn: sys/ufs/ffs/ffs_vnops.c 7.76
SCCS-vsn: sys/ufs/ffs/ufs_inode.c 7.45
SCCS-vsn: sys/ufs/ufs/ufs_inode.c 7.45
SCCS-vsn: sys/ufs/ffs/ufs_lookup.c 7.45
SCCS-vsn: sys/ufs/ufs/ufs_lookup.c 7.45
SCCS-vsn: sys/ufs/ffs/ufs_quota.c 7.15
SCCS-vsn: sys/ufs/ufs/ufs_quota.c 7.15