diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
index d55d0ad..8db10bb 100644
--- a/arch/powerpc/sysdev/cpm_common.c
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -3,7 +3,7 @@
  *
  * Author: Scott Wood <scottwood@freescale.com>
  *
- * Copyright 2007 Freescale Semiconductor, Inc.
+ * Copyright 2007-2008,2010 Freescale Semiconductor, Inc.
  *
  * Some parts derived from commproc.c/cpm2_common.c, which is:
  * Copyright (c) 1997 Dan error_act (dmalek@jlc.net)
@@ -146,6 +146,7 @@
 	spin_lock_irqsave(&cpm_muram_lock, flags);
 	cpm_muram_info.alignment = align;
 	start = rh_alloc(&cpm_muram_info, size, "commproc");
+	memset(cpm_muram_addr(start), 0, size);
 	spin_unlock_irqrestore(&cpm_muram_lock, flags);
 
 	return start;