PAGE_ALIGN
bootinfo = CreateBootInfo((TAny *)PAGE_ALIGN(buf));
(struct loaddesc *)PAGE_ALIGN(User::AllocL(ALIGN_SAFE_PAGE_SIZE));
safeAddress = (TAny *)PAGE_ALIGN(a1);
size = PAGE_ALIGN(vs->vs_format.sample_size) * nbufs;
buf->length = PAGE_ALIGN(vs->vs_format.sample_size);