1 files changed, 3 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index da0924293496..f2fab687a01c 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -1664,6 +1664,9 @@ _STATIC(__after_prom_start)
                                         /*   i.e. where we are running   */
                                         /*      the source addr          */
 
+        cmpdi   r4,0                    /* In some cases the loader may  */
+        beq     .start_here_multiplatform /* have already put us at zero */
+                                        /* so we can skip the copy.      */
         LOAD_REG_IMMEDIATE(r5,copy_to_here) /* # bytes of memory to copy */
         sub     r5,r5,r27