121f2faca2c0 ("xen/balloon: rename alloc/free_xenballooned_pages")
9e2369c06c8a ("xen: add helpers to allocate unpopulated memory")
1951fa33ec25 ("xen/balloon: fix accounting in alloc_xenballooned_pages error path")
3848e4e0a32a ("xen/xenbus: avoid large structs and arrays on the stack")