memmap_alloc
extern void *memmap_alloc(phys_addr_t size, phys_addr_t align,
map = memmap_alloc(size, SMP_CACHE_BYTES, MEMBLOCK_LOW_LIMIT,
return memmap_alloc(size, align, goal, node, false);
map = memmap_alloc(size, size, addr, nid, false);
sparsemap_buf = memmap_alloc(size, section_map_size(), addr, nid, true);