datapath: Avoid backported csum_replace4() on RHEL 5.

[sliver-openvswitch.git] / datapath / linux-2.6 / compat-2.6 / include / net / checksum.h

diff --git a/datapath/linux-2.6/compat-2.6/include/net/checksum.h b/datapath/linux-2.6/compat-2.6/include/net/checksum.h
index e7e7966..73f2f59 100644 (file)
--- a/datapath/linux-2.6/compat-2.6/include/net/checksum.h
+++ b/datapath/linux-2.6/compat-2.6/include/net/checksum.h
@@ -18,14 +18,16 @@ static inline __wsum csum_unfold(__sum16 n)
        csum_and_copy_to_user(src, dst, len, sum, NULL, err_ptr)
 #endif
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
+#ifndef HAVE_CSUM_REPLACE4
 static inline void csum_replace4(__sum16 *sum, __be32 from, __be32 to)
 {
        __be32 diff[] = { ~from, to };
 
        *sum = csum_fold(csum_partial((char *)diff, sizeof(diff), ~csum_unfold(*sum)));
 }
+#endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
 #define inet_proto_csum_replace2(sum, skb, from, to, pseudohdr) \
        inet_proto_csum_replace4(sum, skb, (__force __be32)(from), \
                                           (__force __be32)(to), pseudohdr)