[PATCH] mm: add arch_alloc_page

Add an arch_alloc_page to match arch_free_page.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/gfp.h

@@ -116,6 +116,9 @@ static inline enum zone_type gfp_zone(gfp_t flags)
 #ifndef HAVE_ARCH_FREE_PAGE
 static inline void arch_free_page(struct page *page, int order) { }
 #endif
+#ifndef HAVE_ARCH_ALLOC_PAGE
+static inline void arch_alloc_page(struct page *page, int order) { }
+#endif
 
 extern struct page *
 FASTCALL(__alloc_pages(gfp_t, unsigned int, struct zonelist *));

mm/page_alloc.c

@@ -598,6 +598,8 @@ static int prep_new_page(struct page *page, int order, gfp_t gfp_flags)
 			1 << PG_checked | 1 << PG_mappedtodisk);
 	set_page_private(page, 0);
 	set_page_refcounted(page);
+
+	arch_alloc_page(page, order);
 	kernel_map_pages(page, 1 << order, 1);
 
 	if (gfp_flags & __GFP_ZERO)