diff --git a/sys/gnu/ext2fs/ext2_readwrite.c b/sys/gnu/ext2fs/ext2_readwrite.c
index 50fae6b84119..6194911942f5 100644
--- a/sys/gnu/ext2fs/ext2_readwrite.c
+++ b/sys/gnu/ext2fs/ext2_readwrite.c
@@ -272,7 +272,7 @@ WRITE(ap)
 		} else if (xfersize + blkoffset == fs->s_frag_size) {
 			if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) {
 				bp->b_flags |= B_CLUSTEROK;
-				cluster_write(bp, ip->i_size, seqcount);
+				cluster_write(vp, bp, ip->i_size, seqcount);
 			} else {
 				bawrite(bp);
 			}
diff --git a/sys/gnu/fs/ext2fs/ext2_readwrite.c b/sys/gnu/fs/ext2fs/ext2_readwrite.c
index 50fae6b84119..6194911942f5 100644
--- a/sys/gnu/fs/ext2fs/ext2_readwrite.c
+++ b/sys/gnu/fs/ext2fs/ext2_readwrite.c
@@ -272,7 +272,7 @@ WRITE(ap)
 		} else if (xfersize + blkoffset == fs->s_frag_size) {
 			if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) {
 				bp->b_flags |= B_CLUSTEROK;
-				cluster_write(bp, ip->i_size, seqcount);
+				cluster_write(vp, bp, ip->i_size, seqcount);
 			} else {
 				bawrite(bp);
 			}
diff --git a/sys/kern/vfs_cluster.c b/sys/kern/vfs_cluster.c
index 453831fe0a4f..3eadf00acc3f 100644
--- a/sys/kern/vfs_cluster.c
+++ b/sys/kern/vfs_cluster.c
@@ -603,18 +603,13 @@ cluster_wbuild_wb(struct vnode *vp, long size, daddr_t start_lbn, int len)
  *	4.	end of a cluster - asynchronously write cluster
  */
 void
-cluster_write(bp, filesize, seqcount)
-	struct buf *bp;
-	u_quad_t filesize;
-	int seqcount;
+cluster_write(struct vnode *vp, struct buf *bp, u_quad_t filesize, int seqcount)
 {
-	struct vnode *vp;
 	daddr_t lbn;
 	int maxclen, cursize;
 	int lblocksize;
 	int async;
 
-	vp = bp->b_vp;
 	if (vp->v_type == VREG) {
 		async = vp->v_mount->mnt_flag & MNT_ASYNC;
 		lblocksize = vp->v_mount->mnt_stat.f_iosize;
diff --git a/sys/sys/buf.h b/sys/sys/buf.h
index 1494fbc00650..c88f6f58d5b3 100644
--- a/sys/sys/buf.h
+++ b/sys/sys/buf.h
@@ -507,7 +507,7 @@ void	cluster_callback(struct buf *);
 int	cluster_read(struct vnode *, u_quad_t, daddr_t, long,
 	    struct ucred *, long, int, struct buf **);
 int	cluster_wbuild(struct vnode *, long, daddr_t, int);
-void	cluster_write(struct buf *, u_quad_t, int);
+void	cluster_write(struct vnode *, struct buf *, u_quad_t, int);
 void	vfs_bio_set_validclean(struct buf *, int base, int size);
 void	vfs_bio_clrbuf(struct buf *);
 void	vfs_busy_pages(struct buf *, int clear_modify);
diff --git a/sys/ufs/ffs/ffs_vnops.c b/sys/ufs/ffs/ffs_vnops.c
index 4f446880cd96..616f9e8186dc 100644
--- a/sys/ufs/ffs/ffs_vnops.c
+++ b/sys/ufs/ffs/ffs_vnops.c
@@ -699,7 +699,7 @@ ffs_write(ap)
 		} else if (xfersize + blkoffset == fs->fs_bsize) {
 			if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) {
 				bp->b_flags |= B_CLUSTEROK;
-				cluster_write(bp, ip->i_size, seqcount);
+				cluster_write(vp, bp, ip->i_size, seqcount);
 			} else {
 				bawrite(bp);
 			}