hash_for_each_possible
hash_for_each_possible(sync->fences, e, node, f->context) {
hash_for_each_possible(gvt->cmd_table, e, hlist, opcode) {
hash_for_each_possible(gvt->mmio.mmio_info_table, e, node, offset) {
hash_for_each_possible(info->ptable, p, hnode, gfn) {
hash_for_each_possible(engine->cmd_hash, desc_node, node,