uvm_swap_free
uvm_swap_free(anon->an_swslot, 1);
uvm_swap_free(anon->an_swslot, 1);
uvm_swap_free(slot, 1);
uvm_swap_free(slot, 1);
uvm_swap_free(slot, 1);
uvm_swap_free(slot + nused, nallocated - nused);
uvm_swap_free(slot, nused);
uvm_swap_free(anon->an_swslot, 1);
void uvm_swap_free(int, int);