X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=mm%2Fpage_alloc.c;h=c2ee4ecad083f897d9ce181492502f48645e0bc3;hb=d70ddd7a5d9aa335f9b4b0c3d879e1e70ee1e4e3;hp=5e6fa06f2784c8cf9b2defd40120c0be32ca444e;hpb=bbe179f88d39274630823a0dc07d2714fd19a103;p=uclinux-h8%2Flinux.git

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5e6fa06f2784..c2ee4ecad083 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -764,6 +764,66 @@ static int free_tail_pages_check(struct page *head_page, struct page *page)
 	return 0;
 }
 
+static void __meminit __init_single_page(struct page *page, unsigned long pfn,
+				unsigned long zone, int nid)
+{
+	struct zone *z = &NODE_DATA(nid)->node_zones[zone];
+
+	set_page_links(page, zone, nid, pfn);
+	mminit_verify_page_links(page, zone, nid, pfn);
+	init_page_count(page);
+	page_mapcount_reset(page);
+	page_cpupid_reset_last(page);
+
+	/*
+	 * Mark the block movable so that blocks are reserved for
+	 * movable at startup. This will force kernel allocations
+	 * to reserve their blocks rather than leaking throughout
+	 * the address space during boot when many long-lived
+	 * kernel allocations are made. Later some blocks near
+	 * the start are marked MIGRATE_RESERVE by
+	 * setup_zone_migrate_reserve()
+	 *
+	 * bitmap is created for zone's valid pfn range. but memmap
+	 * can be created for invalid pages (for alignment)
+	 * check here not to call set_pageblock_migratetype() against
+	 * pfn out of zone.
+	 */
+	if ((z->zone_start_pfn <= pfn)
+	    && (pfn < zone_end_pfn(z))
+	    && !(pfn & (pageblock_nr_pages - 1)))
+		set_pageblock_migratetype(page, MIGRATE_MOVABLE);
+
+	INIT_LIST_HEAD(&page->lru);
+#ifdef WANT_PAGE_VIRTUAL
+	/* The shift won't overflow because ZONE_NORMAL is below 4G. */
+	if (!is_highmem_idx(zone))
+		set_page_address(page, __va(pfn << PAGE_SHIFT));
+#endif
+}
+
+static void __meminit __init_single_pfn(unsigned long pfn, unsigned long zone,
+					int nid)
+{
+	return __init_single_page(pfn_to_page(pfn), pfn, zone, nid);
+}
+
+/*
+ * Initialised pages do not have PageReserved set. This function is
+ * called for each range allocated by the bootmem allocator and
+ * marks the pages PageReserved. The remaining valid pages are later
+ * sent to the buddy page allocator.
+ */
+void reserve_bootmem_region(unsigned long start, unsigned long end)
+{
+	unsigned long start_pfn = PFN_DOWN(start);
+	unsigned long end_pfn = PFN_UP(end);
+
+	for (; start_pfn < end_pfn; start_pfn++)
+		if (pfn_valid(start_pfn))
+			SetPageReserved(pfn_to_page(start_pfn));
+}
+
 static bool free_pages_prepare(struct page *page, unsigned int order)
 {
 	bool compound = PageCompound(page);
@@ -818,7 +878,8 @@ static void __free_pages_ok(struct page *page, unsigned int order)
 	local_irq_restore(flags);
 }
 
-void __init __free_pages_bootmem(struct page *page, unsigned int order)
+void __init __free_pages_bootmem(struct page *page, unsigned long pfn,
+							unsigned int order)
 {
 	unsigned int nr_pages = 1 << order;
 	struct page *p = page;
@@ -4212,7 +4273,6 @@ static void setup_zone_migrate_reserve(struct zone *zone)
 void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
 		unsigned long start_pfn, enum memmap_context context)
 {
-	struct page *page;
 	unsigned long end_pfn = start_pfn + size;
 	unsigned long pfn;
 	struct zone *z;
@@ -4233,38 +4293,7 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
 			if (!early_pfn_in_nid(pfn, nid))
 				continue;
 		}
-		page = pfn_to_page(pfn);
-		set_page_links(page, zone, nid, pfn);
-		mminit_verify_page_links(page, zone, nid, pfn);
-		init_page_count(page);
-		page_mapcount_reset(page);
-		page_cpupid_reset_last(page);
-		SetPageReserved(page);
-		/*
-		 * Mark the block movable so that blocks are reserved for
-		 * movable at startup. This will force kernel allocations
-		 * to reserve their blocks rather than leaking throughout
-		 * the address space during boot when many long-lived
-		 * kernel allocations are made. Later some blocks near
-		 * the start are marked MIGRATE_RESERVE by
-		 * setup_zone_migrate_reserve()
-		 *
-		 * bitmap is created for zone's valid pfn range. but memmap
-		 * can be created for invalid pages (for alignment)
-		 * check here not to call set_pageblock_migratetype() against
-		 * pfn out of zone.
-		 */
-		if ((z->zone_start_pfn <= pfn)
-		    && (pfn < zone_end_pfn(z))
-		    && !(pfn & (pageblock_nr_pages - 1)))
-			set_pageblock_migratetype(page, MIGRATE_MOVABLE);
-
-		INIT_LIST_HEAD(&page->lru);
-#ifdef WANT_PAGE_VIRTUAL
-		/* The shift won't overflow because ZONE_NORMAL is below 4G. */
-		if (!is_highmem_idx(zone))
-			set_page_address(page, __va(pfn << PAGE_SHIFT));
-#endif
+		__init_single_pfn(pfn, zone, nid);
 	}
 }