From d102708932b990eb6ccc091f1c56f8d046fdd361 Mon Sep 17 00:00:00 2001
From: David Vrabel <david.vrabel@citrix.com>
Date: Wed, 14 Sep 2011 16:22:02 -0700
Subject: [PATCH] --- yaml --- r: 263826 b: refs/heads/master c:
 461ae488ecb125b140d7ea29ceeedbcce9327003 h: refs/heads/master v: v3

---
 [refs]             | 2 +-
 trunk/mm/vmalloc.c | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index cc0b21ec33af..3fcc3af93659 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 185efc0f9a1f2d6ad6d4782c5d9e529f3290567f
+refs/heads/master: 461ae488ecb125b140d7ea29ceeedbcce9327003
diff --git a/trunk/mm/vmalloc.c b/trunk/mm/vmalloc.c
index 7ef0903058ee..5016f19e1661 100644
--- a/trunk/mm/vmalloc.c
+++ b/trunk/mm/vmalloc.c
@@ -2140,6 +2140,14 @@ struct vm_struct *alloc_vm_area(size_t size)
 		return NULL;
 	}
 
+	/*
+	 * If the allocated address space is passed to a hypercall
+	 * before being used then we cannot rely on a page fault to
+	 * trigger an update of the page tables.  So sync all the page
+	 * tables here.
+	 */
+	vmalloc_sync_all();
+
 	return area;
 }
 EXPORT_SYMBOL_GPL(alloc_vm_area);