1 files changed, 6 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index d50c8df0183e..535a33e4aa37 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -491,7 +491,12 @@ void __init finish_device_tree(void)
         size = 16;
         finish_node(allnodes, &size, 1);
         size -= 16;
-        end = start = (unsigned long) __va(lmb_alloc(size, 128));
+
+        if (0 == size)
+                end = start = 0;
+        else
+                end = start = (unsigned long)__va(lmb_alloc(size, 128));
+
         finish_node(allnodes, &end, 0);
         BUG_ON(end != start + size);