kernel_data.end = virt_to_phys(_end - 1);
for_each_memblock(memory, region) {
kernel_data.end = virt_to_phys(_end - 1);
for_each_memblock(memory, region) {
res->name = "System RAM";
res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
res->name = "System RAM";
res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;