--- zzzz-none-000/linux-3.10.107/arch/powerpc/lib/code-patching.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/powerpc/lib/code-patching.c	2021-02-04 17:41:59.000000000 +0000
@@ -159,6 +159,21 @@
 	return 0;
 }
 
+#ifdef CONFIG_PPC_BOOK3E_64
+void __patch_exception(int exc, unsigned long addr)
+{
+	extern unsigned int interrupt_base_book3e;
+	unsigned int *ibase = &interrupt_base_book3e;
+
+	/* Our exceptions vectors start with a NOP and -then- a branch
+	 * to deal with single stepping from userspace which stops on
+	 * the second instruction. Thus we need to patch the second
+	 * instruction of the exception, not the first one
+	 */
+
+	patch_branch(ibase + (exc / 4) + 1, addr, 0);
+}
+#endif
 
 #ifdef CONFIG_CODE_PATCHING_SELFTEST