mm: page_alloc: fix CMA area initialisation when pageblock > MAX_ORDER

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b09bb61..7e7f947 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -799,9 +799,21 @@ void __init init_cma_reserved_pageblock(struct page *page)
                set_page_count(p, 0);
        } while (++p, --i);
 
-       set_page_refcounted(page);
        set_pageblock_migratetype(page, MIGRATE_CMA);
-       __free_pages(page, pageblock_order);
+
+       if (pageblock_order >= MAX_ORDER) {
+               i = pageblock_nr_pages;
+               p = page;
+               do {
+                       set_page_refcounted(p);
+                       __free_pages(p, MAX_ORDER - 1);
+                       p += MAX_ORDER_NR_PAGES;
+               } while (i -= MAX_ORDER_NR_PAGES);
+       } else {
+               set_page_refcounted(page);
+               __free_pages(page, pageblock_order);
+       }
+
        adjust_managed_page_count(page, pageblock_nr_pages);
 }
 #endif