Index: arch/ppc32/_link.ld.in
===================================================================
--- arch/ppc32/_link.ld.in	(revision 7f7859b9cc377a9854528f655c07d282ce184e60)
+++ arch/ppc32/_link.ld.in	(revision 33472fa6105b2c5ae7b20ce9c8a1ab5213e54080)
@@ -15,4 +15,5 @@
 
 ENTRY(kernel_image_start)
+OUTPUT_FORMAT("elf32-powerpc")
 OUTPUT_ARCH("powerpc:common")
 
Index: arch/ppc64/_link.ld.in
===================================================================
--- arch/ppc64/_link.ld.in	(revision 7f7859b9cc377a9854528f655c07d282ce184e60)
+++ arch/ppc64/_link.ld.in	(revision 33472fa6105b2c5ae7b20ce9c8a1ab5213e54080)
@@ -15,4 +15,5 @@
 
 ENTRY(kernel_image_start)
+OUTPUT_FORMAT("elf64-powerpc")
 OUTPUT_ARCH(powerpc:common64)