From 8f6d230fcd41cf23e1c41922d60daf524cb37c8a Mon Sep 17 00:00:00 2001
From: Yifeng Sun <pkusunyifeng@gmail.com>
Date: Fri, 26 Apr 2019 14:42:07 -0700
Subject: datapath: Fix compiling error for 4.14.111+ kernel

Acked-by: Yi-Hung Wei <yihung.wei@gmail.com>
Tested-by: Greg Rose <gvrose8192@gmail.com>
Reviewed-by: Greg Rose <gvrose8192@gmail.com>
Fixes: f72469405eec9 ("datapath: meter: Use struct_size() in kzalloc()")
Signed-off-by: Yifeng Sun <pkusunyifeng@gmail.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
---
 .travis.yml                                    | 2 +-
 acinclude.m4                                   | 2 ++
 datapath/linux/compat/include/linux/overflow.h | 4 ++--
 datapath/meter.c                               | 1 +
 4 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 32d5f1918..468c39ecd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,7 +39,7 @@ env:
   - KERNEL=4.17.19
   - KERNEL=4.16.18
   - KERNEL=4.15.18
-  - KERNEL=4.14.63
+  - KERNEL=4.14.111
   - KERNEL=4.9.149
   - KERNEL=4.4.148
   - KERNEL=3.19.8
diff --git a/acinclude.m4 b/acinclude.m4
index 301aeb70d..b532a4579 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -920,6 +920,8 @@ AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
                         [OVS_DEFINE([HAVE_INET_FRAGS_RND])])
   OVS_GREP_IFELSE([$KSRC/include/linux/overflow.h], [__LINUX_OVERFLOW_H],
                   [OVS_DEFINE([HAVE_OVERFLOW_H])])
+  OVS_GREP_IFELSE([$KSRC/include/linux/overflow.h], [struct_size],
+                  [OVS_DEFINE([HAVE_STRUCT_SIZE])])
   OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_array],
                   [OVS_DEFINE([HAVE_KVMALLOC_ARRAY])])
   OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_node],
diff --git a/datapath/linux/compat/include/linux/overflow.h b/datapath/linux/compat/include/linux/overflow.h
index ff84356db..13ae6cf6a 100644
--- a/datapath/linux/compat/include/linux/overflow.h
+++ b/datapath/linux/compat/include/linux/overflow.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
-#ifdef HAVE_OVERFLOW_H
+#if defined(HAVE_OVERFLOW_H) && defined(HAVE_STRUCT_SIZE)
 #include_next <linux/overflow.h>
 #else
 #ifndef __LINUX_OVERFLOW_H
@@ -310,4 +310,4 @@ static inline __must_check size_t __ab_c_size(size_t n, size_t size, size_t c)
 		    sizeof(*(p)))
 
 #endif /* __LINUX_OVERFLOW_H */
-#endif /* HAVE_OVERFLOW_H */
+#endif /* defined(HAVE_OVERFLOW_H) && defined(HAVE_STRUCT_SIZE) */
diff --git a/datapath/meter.c b/datapath/meter.c
index 51ec14950..eda14682f 100644
--- a/datapath/meter.c
+++ b/datapath/meter.c
@@ -13,6 +13,7 @@
 #include <linux/ip.h>
 #include <linux/kernel.h>
 #include <linux/openvswitch.h>
+#include <linux/overflow.h>
 #include <linux/netlink.h>
 #include <linux/rculist.h>
 
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