vtruncbuf_bp_trunc_cmp
static int vtruncbuf_bp_trunc_cmp(struct buf *bp, void *data);
vtruncbuf_bp_trunc_cmp,
vtruncbuf_bp_trunc_cmp,
vtruncbuf_bp_trunc_cmp,
vtruncbuf_bp_trunc_cmp,
vtruncbuf_bp_trunc_cmp(bp, data))