usablemem 279 arch/arm64/mm/init.c struct memblock_region *usablemem = data; usablemem 290 arch/arm64/mm/init.c usablemem->base = dt_mem_next_cell(dt_root_addr_cells, ®); usablemem 291 arch/arm64/mm/init.c usablemem->size = dt_mem_next_cell(dt_root_size_cells, ®);