From: Andrew Morton <akpm@linux-foundation.org>
Date: Mon, 28 Apr 2008 09:12:44 +0000 (-0700)
Subject: page_mapping(): add ifdef around reference to swapper_space
X-Git-Tag: v2.6.26-rc1~972
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=726b80127239aeea9c8d8aad5b4e2c80313e3ce8;p=linux-2.6

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 <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 24659ed06b..4f3c1b2f44 100644
--- 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;
 }