datapath: Add IS_ERR_OR_NULL for backward compatibility.

[cascardo/ovs.git] / acinclude.m4

diff --git a/acinclude.m4 b/acinclude.m4
index 742862d..e903273 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -283,6 +283,7 @@ AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
                   [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
 
   OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
+  OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
 
   OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
   OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])