page_mapping(): add ifdef around reference to swapper_space

This fixes the superh build when the pageflags patches are applied. But it shouldn't unless it's a gcc bug. Cc: Christoph Lameter <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
adn770 · Apr 28, 2008 · 726b801 · 726b801
1 parent 1cdf25d
commit 726b801
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/include/linux/mm.h b/include/linux/mm.h
@@ -605,9 +605,12 @@ 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 if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON))
+	else
+#endif
+	if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON))
 		mapping = NULL;
 	return mapping;
 }