From acda1b0d97fa9e2a3ea3a51619d30d7f2d0f7244 Mon Sep 17 00:00:00 2001
From: Christian Kellner <christian@kellner.me>
Date: Tue, 26 Mar 2019 17:52:28 +0100
Subject: [PATCH] common: use sendfile instead of copy_file_range

On older kernels we cannot use copy_file_range so use sendfile
instead.
---
 common/bolt-io.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common/bolt-io.c b/common/bolt-io.c
index 5e50afa..375f978 100644
--- a/common/bolt-io.c
+++ b/common/bolt-io.c
@@ -26,6 +26,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <sys/types.h>
+#include <sys/sendfile.h>
 #include <sys/stat.h>
 #include <stdio.h>
 #include <string.h>
@@ -831,7 +832,7 @@ bolt_copy_bytes (int      fd_from,
     {
       ssize_t r;
 
-      r = copy_file_range (fd_from, NULL, fd_to, NULL, len, 0);
+      r = sendfile (fd_to, fd_from, NULL, len);
 
       if (r == -1)
         {
-- 
2.20.1