nfs_doio
int nfs_doio(struct vnode *vp, struct bio *, struct thread *);
nfs_doio(vp, bio, td);
nfs_doio(vp, bio, td);
error = nfs_doio(vp, &bp->b_bio2, td);
error = nfs_doio(vp, &bp->b_bio2, td);
error = nfs_doio(vp, &bp->b_bio2, td);
error = nfs_doio(vp, &bp->b_bio2, td);
error = nfs_doio(vp, &bp->b_bio2, td);
error = nfs_doio(ap->a_vp, nbio, td);