- if (nr_flips != 0) {
- reservation.extent_start = np->rx_pfn_array;
- reservation.nr_extents = nr_flips;
- reservation.extent_order = 0;
- reservation.address_bits = 0;
- reservation.domid = DOMID_SELF;
-
- if (!xen_feature(XENFEAT_auto_translated_physmap)) {
- /* After all PTEs have been zapped, flush the TLB. */
- np->rx_mcl[i-1].args[MULTI_UVMFLAGS_INDEX] =
- UVMF_TLB_FLUSH|UVMF_ALL;
-
- /* Give away a batch of pages. */
- np->rx_mcl[i].op = __HYPERVISOR_memory_op;
- np->rx_mcl[i].args[0] = XENMEM_decrease_reservation;
- np->rx_mcl[i].args[1] = (unsigned long)&reservation;
-
- /* Zap PTEs and give away pages in one big
- * multicall. */
- (void)HYPERVISOR_multicall(np->rx_mcl, i+1);
-
- /* Check return status of HYPERVISOR_memory_op(). */
- if (unlikely(np->rx_mcl[i].result != i))
- panic("Unable to reduce memory reservation\n");
- } else {
- if (HYPERVISOR_memory_op(XENMEM_decrease_reservation,
- &reservation) != i)
- panic("Unable to reduce memory reservation\n");
- }
- } else {
- wmb(); /* barrier so backend seens requests */
- }