[PATCH] powerpc: Fix build error with 64K pages and !hugetlbfs

[Benjamin Herrenschmidt]

HAVE_ARCH_UNMAPPED_AREA and HAVE_ARCH_UNMAPPED_AREA_TOPDOWN must
be defined whenever CONFIG_PPC_MM_SLICES is enabled, not only when
CONFIG_HUGETLB_PAGE is. They used to be always defined together but
this is no longer the case.

Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
---

 arch/powerpc/include/asm/pgtable-ppc64.h |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- linux-work.orig/arch/powerpc/include/asm/pgtable-ppc64.h	2008-09-03 13:06:58.000000000 +1000
+++ linux-work/arch/powerpc/include/asm/pgtable-ppc64.h	2008-09-03 13:07:14.000000000 +1000
@@ -153,12 +153,10 @@
 #define __S110	PAGE_SHARED_X
 #define __S111	PAGE_SHARED_X
 
-#ifdef CONFIG_HUGETLB_PAGE
-
+#ifdef CONFIG_PPC_MM_SLICES
 #define HAVE_ARCH_UNMAPPED_AREA
 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
-
-#endif
+#endif /* CONFIG_PPC_MM_SLICES */
 
 #ifndef __ASSEMBLY__