untagged_addr_remote
vaddr = untagged_addr_remote(mm, vaddr);
start_vaddr = untagged_addr_remote(mm, svpfn << PAGE_SHIFT);
#ifndef untagged_addr_remote
start = untagged_addr_remote(mm, start);
address = untagged_addr_remote(mm, address);
untagged_addr_remote(mm, start);
addr = untagged_addr_remote(mm, addr);
addr = untagged_addr_remote(mm, addr);
addr = (unsigned long)untagged_addr_remote(mm, p);