diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 3585e1d7e898..40d114e69cbe 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -36,22 +36,11 @@
  */
 #include <asm/feature-fixups.h>
 
-/* PACA save area offsets (exgen, exmc, etc) */
-#define EX_R9		0
-#define EX_R10		8
-#define EX_R11		16
-#define EX_R12		24
-#define EX_R13		32
-#define EX_DAR		40
-#define EX_DSISR	48
-#define EX_CCR		52
-#define EX_CFAR		56
-#define EX_PPR		64
+/* PACA save area size in u64 units (exgen, exmc, etc) */
 #if defined(CONFIG_RELOCATABLE)
-#define EX_CTR		72
-#define EX_SIZE		10	/* size in u64 units */
+#define EX_SIZE		10
 #else
-#define EX_SIZE		9	/* size in u64 units */
+#define EX_SIZE		9
 #endif
 
 /*
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 9b60fa040aa6..4dfccc2efc95 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -21,6 +21,28 @@
 #include <asm/feature-fixups.h>
 #include <asm/kup.h>
 
+/* PACA save area offsets (exgen, exmc, etc) */
+#define EX_R9		0
+#define EX_R10		8
+#define EX_R11		16
+#define EX_R12		24
+#define EX_R13		32
+#define EX_DAR		40
+#define EX_DSISR	48
+#define EX_CCR		52
+#define EX_CFAR		56
+#define EX_PPR		64
+#if defined(CONFIG_RELOCATABLE)
+#define EX_CTR		72
+.if EX_SIZE != 10
+	.error "EX_SIZE is wrong"
+.endif
+#else
+.if EX_SIZE != 9
+	.error "EX_SIZE is wrong"
+.endif
+#endif
+
 /*
  * We're short on space and time in the exception prolog, so we can't
  * use the normal LOAD_REG_IMMEDIATE macro to load the address of label.