From 8b7f79f723fed185c850f62edc7dcc1d3662eb49 Mon Sep 17 00:00:00 2001
From: Nishanth Aravamudan <nacc@us.ibm.com>
Date: Thu, 31 Aug 2006 21:27:53 -0700
Subject: [PATCH] --- yaml --- r: 33769 b: refs/heads/master c:
 3b98b087fc2daab67518d2baa8aef19a6ad82723 h: refs/heads/master i:   33767:
 f5a1de81b91e43ef7fcfd82ca95948fb31cd55e3 v: v3

---
 [refs]               |  2 +-
 trunk/mm/mempolicy.c | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index b1fd62dd9f25..4fdc7bda8b82 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1678df37be8abbb381becdc40242ed915e775550
+refs/heads/master: 3b98b087fc2daab67518d2baa8aef19a6ad82723
diff --git a/trunk/mm/mempolicy.c b/trunk/mm/mempolicy.c
index e07e27e846a2..a9963ceddd65 100644
--- a/trunk/mm/mempolicy.c
+++ b/trunk/mm/mempolicy.c
@@ -1176,7 +1176,15 @@ static inline unsigned interleave_nid(struct mempolicy *pol,
 	if (vma) {
 		unsigned long off;
 
-		off = vma->vm_pgoff;
+		/*
+		 * for small pages, there is no difference between
+		 * shift and PAGE_SHIFT, so the bit-shift is safe.
+		 * for huge pages, since vm_pgoff is in units of small
+		 * pages, we need to shift off the always 0 bits to get
+		 * a useful offset.
+		 */
+		BUG_ON(shift < PAGE_SHIFT);
+		off = vma->vm_pgoff >> (shift - PAGE_SHIFT);
 		off += (addr - vma->vm_start) >> shift;
 		return offset_il_node(pol, vma, off);
 	} else