Fix memory policy build without CONFIG_HUGETLBFS

From: "Chen, Kenneth W" <kenneth.w.chen@intel.com>

> mm/mempolicy.c: In function `huge_zonelist':
> mm/mempolicy.c:1045: error: `HPAGE_SHIFT' undeclared (first use in
this function)
> mm/mempolicy.c:1045: error: (Each undeclared identifier is reported
only once
> mm/mempolicy.c:1045: error: for each function it appears in.)
> make[1]: *** [mm/mempolicy.o] Error 1

Need to wrap huge_zonelist function with CONFIG_HUGETLBFS.


Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>


Index: linux/mm/mempolicy.c
===================================================================
--- linux.orig/mm/mempolicy.c
+++ linux/mm/mempolicy.c
@@ -1034,6 +1034,7 @@ static inline unsigned interleave_nid(st
 		return interleave_nodes(pol);
 }
 
+#ifdef CONFIG_HUGETLBFS
 /* Return a zonelist suitable for a huge page allocation. */
 struct zonelist *huge_zonelist(struct vm_area_struct *vma, unsigned long addr)
 {
@@ -1047,6 +1048,7 @@ struct zonelist *huge_zonelist(struct vm
 	}
 	return zonelist_policy(GFP_HIGHUSER, pol);
 }
+#endif
 
 /* Allocate a page in interleaved policy.
    Own path because it needs to do special accounting. */