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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>
This commit is contained in:
Andrew Morton 2008-04-28 02:12:44 -07:00 committed by Linus Torvalds
parent 1cdf25d704
commit 726b801272
1 changed files with 4 additions and 1 deletions
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5
include/linux/mm.h
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@ -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;
}