include/linux/mm.h: remove unneeded ifdef

The check code for CONFIG_SWAP is redundant, because there is a non-CONFIG_SWAP version for PageSwapCache() which just returns 0. Signed-off-by: Huang Shijie <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
rtvt123 · Dec 15, 2009 · f096e59 · f096e59
1 parent c9d0bf2
commit f096e59
Showing 1 changed file with 1 addition and 4 deletions.
diff --git a/include/linux/mm.h b/include/linux/mm.h
@@ -643,12 +643,9 @@ static inline struct address_space *page_mapping(struct page *page)
 	struct address_space *mapping = page->mapping;
 
 	VM_BUG_ON(PageSlab(page));
-#ifdef CONFIG_SWAP
 	if (unlikely(PageSwapCache(page)))
 		mapping = &swapper_space;
-	else
-#endif
-	if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON))
+	else if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON))
 		mapping = NULL;
 	return mapping;
 }