--- /dev/null
+From 6ebf6c4f9e5ebca123a5b5f24afe67cf0473cf92 Mon Sep 17 00:00:00 2001
+From: "Dmitry V. Levin" <ldv@altlinux.org>
+Date: Wed, 21 Feb 2018 23:03:27 +0000
+Subject: [PATCH] m68k: fix build
+
+When <sys/reg.h> is included after <linux/ptrace.h>, the build fails
+on m68k with the following diagnostics:
+
+ In file included from /usr/include/linux/ptrace.h:101:0,
+ from ptrace.h:51,
+ from sigreturn.c:2:
+ /usr/include/m68k-linux-gnu/sys/reg.h:26:3: error: expected identifier
+ before numeric constant
+ PT_D1 = 0,
+ ^
+
+Apparently, the only architecture where strace needs definitions
+provided by <sys/reg.h> is x86_64, other three (m68k, tile, and x86)
+are fine with definitions already provided by <linux/ptrace.h>.
+
+Fix the issue by getting rid of <sys/reg.h> and defining necessary
+macros in linux/x86_64/arch_regs.h file.
+
+* configure.ac (AC_CHECK_HEADERS): Remove sys/reg.h.
+* regs.h: Do not include <sys/reg.h>.
+* linux/x86_64/arch_regs.h (R15, R14, R13, R12, RBP, RBX, R11, R10,
+R9, R8, RAX, RCX, RDX, RSI, RDI, ORIG_RAX, RIP, CS, EFLAGS, RSP, SS,
+FS_BASE, GS_BASE, DS, ES, FS, GS): New macros.
+* NEWS: Mention this fix.
+
+Fixes: v4.21~21 ("Include <sys/ptrace.h> early")
+[baruch: drop the NEWS and configure.ac hunks]
+Signed-off-by: Baruch Siach <baruch@tkos.co.il>
+---
+Upstream status: commit 6ebf6c4f9e5e
+
+ NEWS | 3 +++
+ configure.ac | 1 -
+ linux/x86_64/arch_regs.h | 29 +++++++++++++++++++++++++++++
+ regs.h | 5 -----
+ 4 files changed, 32 insertions(+), 6 deletions(-)
+
+diff --git a/linux/x86_64/arch_regs.h b/linux/x86_64/arch_regs.h
+index c2ccee671d4f..d502ca4bf202 100644
+--- a/linux/x86_64/arch_regs.h
++++ b/linux/x86_64/arch_regs.h
+@@ -1,2 +1,31 @@
+ extern uint32_t *const i386_esp_ptr;
+ extern uint64_t *const x86_64_rsp_ptr;
++
++/* <asm/ptrace.h> does not provide these definitions. */
++#define R15 0
++#define R14 1
++#define R13 2
++#define R12 3
++#define RBP 4
++#define RBX 5
++#define R11 6
++#define R10 7
++#define R9 8
++#define R8 9
++#define RAX 10
++#define RCX 11
++#define RDX 12
++#define RSI 13
++#define RDI 14
++#define ORIG_RAX 15
++#define RIP 16
++#define CS 17
++#define EFLAGS 18
++#define RSP 19
++#define SS 20
++#define FS_BASE 21
++#define GS_BASE 22
++#define DS 23
++#define ES 24
++#define FS 25
++#define GS 26
+diff --git a/regs.h b/regs.h
+index d89581d7dd3f..7a044cef8fbf 100644
+--- a/regs.h
++++ b/regs.h
+@@ -2,11 +2,6 @@
+ #define STRACE_REGS_H
+
+ #include <sys/user.h>
+-
+-#ifdef HAVE_SYS_REG_H
+-# include <sys/reg.h>
+-#endif
+-
+ #include "arch_regs.h"
+
+ #endif /* !STRACE_REGS_H */
+--
+2.17.0
+