Merge branch 'writeback-for-linus' of git://github.com/fengguang/linux

[pandora-kernel.git] / mm / vmalloc.c

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 7ef0903..5016f19 100644 (file)
--- a/mm/vmalloc.c
+++ b/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);