include/linux/mm.h: remove unneeded ifdef
authorHuang Shijie <shijie8@gmail.com>
Tue, 15 Dec 2009 01:59:51 +0000 (17:59 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 15 Dec 2009 16:53:22 +0000 (08:53 -0800)
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 <shijie8@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/mm.h

index 1202cd3121e1d3dd169a79f1c47dc73b1c07ebe1..52b264563cd98188c8687c4f7372cd72e6e96e1a 100644 (file)
@@ -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;
 }