--- linux-4.12/tools/perf/util/libunwind/x86_32.c.orig	2017-07-03 01:07:02.000000000 +0200
+++ linux-4.12/tools/perf/util/libunwind/x86_32.c	2017-07-13 18:03:18.986458842 +0200
@@ -25,6 +25,7 @@
 #include "libunwind-x86.h"
 #include <../../../../arch/x86/include/uapi/asm/perf_regs.h>
 
+#define EINVAL 22
 /* HAVE_ARCH_X86_64_SUPPORT is used in'arch/x86/util/unwind-libunwind.c'
  * for x86_32, we undef it to compile code for x86_32 only.
  */