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-rw-r--r--mm/vmalloc.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 7ef0903..5016f19 100644
--- 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);

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