ib_ud_header_pack
header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
header_size = ib_ud_header_pack(&sqp->ud_header,
header_size = ib_ud_header_pack(&udh, &ud_header_buffer);
EXPORT_SYMBOL(ib_ud_header_pack);
int ib_ud_header_pack(struct ib_ud_header *header,