reserve_region_with_split
reserve_region_with_split(mem, start, end, "reserved");
reserve_region_with_split(mem, start, end, "Reserved");
reserve_region_with_split(mem, start, end, "Reserved");
reserve_region_with_split(&iomem_resource, start, end, "RAM buffer");
extern void reserve_region_with_split(struct resource *root,