[ovs-dev] [PATCH v2 01/12] datapath: Fix linking without CONFIG_NF_CONNTRACK_LABELS

[Yi-Hung Wei]

From: Arnd Bergmann <arnd at arndb.de>

upstream commit:
commit a277d516de5f498c91d91189717ef7e01102ad27
Author: Arnd Bergmann <arnd at arndb.de>
Date:   Fri Nov 2 16:36:55 2018 +0100

    openvswitch: fix linking without CONFIG_NF_CONNTRACK_LABELS

    When CONFIG_CC_OPTIMIZE_FOR_DEBUGGING is enabled, the compiler
    fails to optimize out a dead code path, which leads to a link failure:

    net/openvswitch/conntrack.o: In function `ovs_ct_set_labels':
    conntrack.c:(.text+0x2e60): undefined reference to `nf_connlabels_replace'

    In this configuration, we can take a shortcut, and completely
    remove the contrack label code. This may also help the regular
    optimization.

    Signed-off-by: Arnd Bergmann <arnd at arndb.de>
    Signed-off-by: David S. Miller <davem at davemloft.net>

Signed-off-by: Yi-Hung Wei <yihung.wei at gmail.com>
---
 datapath/conntrack.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/datapath/conntrack.c b/datapath/conntrack.c
index c6d523758ff1..e328afe1ad15 100644
--- a/datapath/conntrack.c
+++ b/datapath/conntrack.c
@@ -1263,7 +1263,8 @@ static int ovs_ct_commit(struct net *net, struct sw_flow_key *key,
 					 &info->labels.mask);
 		if (err)
 			return err;
-	} else if (labels_nonzero(&info->labels.mask)) {
+	} else if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
+		   labels_nonzero(&info->labels.mask)) {
 		err = ovs_ct_set_labels(ct, key, &info->labels.value,
 					&info->labels.mask);
 		if (err)
-- 
2.7.4