From a5be8ca489b8a6366124282cd46916567ff9440c Mon Sep 17 00:00:00 2001
From: Larry Woodman <lwoodman@redhat.com>
Date: Thu, 24 Jan 2008 05:49:25 -0800
Subject: [PATCH] --- yaml --- r: 75662 b: refs/heads/master c:
 c5c99429fa57dcf6e05203ebe3676db1ec646793 h: refs/heads/master v: v3

---
 [refs]             | 2 +-
 trunk/mm/hugetlb.c | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 386e330a3555..55c8d297555b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c2f3dabefa73fe3307578553f456e93f0a1bca08
+refs/heads/master: c5c99429fa57dcf6e05203ebe3676db1ec646793
diff --git a/trunk/mm/hugetlb.c b/trunk/mm/hugetlb.c
index e0fda156f021..db861d8b6c28 100644
--- a/trunk/mm/hugetlb.c
+++ b/trunk/mm/hugetlb.c
@@ -699,6 +699,11 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
 		dst_pte = huge_pte_alloc(dst, addr);
 		if (!dst_pte)
 			goto nomem;
+
+		/* If the pagetables are shared don't copy or take references */
+		if (dst_pte == src_pte)
+			continue;
+
 		spin_lock(&dst->page_table_lock);
 		spin_lock(&src->page_table_lock);
 		if (!pte_none(*src_pte)) {