+/*
+ * Allocate the accumulated non-linear sections, allocate a mem_map
+ * for each and record the physical to section mapping.
+ */
+void __init sparse_init(void)
+{
+ unsigned long pnum;
+ struct page *map;
+ unsigned long *usemap;
+
+ for (pnum = 0; pnum < NR_MEM_SECTIONS; pnum++) {
+ if (!present_section_nr(pnum))
+ continue;
+
+ map = sparse_early_mem_map_alloc(pnum);
+ if (!map)
+ continue;
+
+ usemap = sparse_early_usemap_alloc(pnum);
+ if (!usemap)
+ continue;
+
+ sparse_init_one_section(__nr_to_section(pnum), pnum, map,
+ usemap);
+ }
+}
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid,
+ unsigned long nr_pages)
+{
+ /* This will make the necessary allocations eventually. */
+ return sparse_mem_map_populate(pnum, nid);
+}
+static void __kfree_section_memmap(struct page *memmap, unsigned long nr_pages)
+{
+ return; /* XXX: Not implemented yet */
+}
+#else