buddy: clarify comments describing buddy merge

[firefly-linux-kernel-4.4.55.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 35b1347d81bb77927dc61120ed6d22f7425329b4..24aa3d1b9d9698770831be0c512164a1cd64fd62 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -432,8 +432,9 @@ static inline void __free_one_page(struct page *page,
 
                buddy = __page_find_buddy(page, page_idx, order);
                if (!page_is_buddy(page, buddy, order))
-                       break;          /* Move the buddy up one level. */
+                       break;
 
+               /* Our buddy is free, merge with it and move up one order. */
                list_del(&buddy->lru);
                zone->free_area[order].nr_free--;
                rmv_page_order(buddy);