mm: rename page_order() to buddy_order()
The current page_order() can only be called on pages in the buddy
allocator. For compound pages, you have to use compound_order(). This is
confusing and led to a bug, so rename page_order() to buddy_order().
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/20201001152259.14932-2-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/shuffle.c b/mm/shuffle.c
index 9b5cd4b..9c2e145 100644
--- a/mm/shuffle.c
+++ b/mm/shuffle.c
@@ -60,7 +60,7 @@ static struct page * __meminit shuffle_valid_page(struct zone *zone,
* ...is the page on the same list as the page we will
* shuffle it with?
*/
- if (page_order(page) != order)
+ if (buddy_order(page) != order)
return NULL;
return page;
