datapath: Avoid backported csum_replace4() on RHEL 5.

[openvswitch] / acinclude.m4

diff --git a/acinclude.m4 b/acinclude.m4
index 565ca6d28226b20101a560dad275910f68110d21..3b691647b5cecef069ed213a042e177781cc0bc8 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -195,6 +195,7 @@ AC_DEFUN([OVS_CHECK_LINUX26_COMPAT], [
   OVS_GREP_IFELSE([$KSRC26/include/linux/types.h], [__wsum],
                   [OVS_DEFINE([HAVE_CSUM_TYPES])])
 
+  OVS_GREP_IFELSE([$KSRC26/include/net/checksum.h], [csum_replace4])
   OVS_GREP_IFELSE([$KSRC26/include/net/checksum.h], [csum_unfold])
 
   OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [NLA_NUL_STRING])