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igmp: fix build warning

Message ID 1455610950-27802-1-git-send-email-sudipm.mukherjee@gmail.com
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Sudip Mukherjee Feb. 16, 2016, 8:22 a.m. UTC 
We were getting build warnings about:
net/ipv4/igmp.c: In function ‘igmp_group_added’:
net/ipv4/igmp.c:1227:14: warning: unused variable ‘net’ [-Wunused-variable]
		
net/ipv4/igmp.c: In function ‘ip_mc_inc_group’:
net/ipv4/igmp.c:1319:14: warning: unused variable ‘net’ [-Wunused-variable]

net/ipv4/igmp.c: In function ‘ip_mc_init_dev’:
net/ipv4/igmp.c:1646:14: warning: unused variable ‘net’ [-Wunused-variable]

net/ipv4/igmp.c: In function ‘ip_mc_up’:
net/ipv4/igmp.c:1665:14: warning: unused variable ‘net’ [-Wunused-variable]

These variables are only used when CONFIG_IP_MULTICAST is defined. Mark
them as '__maybe_unused'.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
---
 net/ipv4/igmp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
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Patch

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 7c95335..0ba241b 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -1224,7 +1224,7 @@  static void igmp_group_dropped(struct ip_mc_list *im)
 static void igmp_group_added(struct ip_mc_list *im)
 {
 	struct in_device *in_dev = im->interface;
-	struct net *net = dev_net(in_dev->dev);
+	struct net __maybe_unused *net = dev_net(in_dev->dev);
 
 	if (im->loaded == 0) {
 		im->loaded = 1;
@@ -1316,7 +1316,7 @@  static void ip_mc_hash_remove(struct in_device *in_dev,
 void ip_mc_inc_group(struct in_device *in_dev, __be32 addr)
 {
 	struct ip_mc_list *im;
-	struct net *net = dev_net(in_dev->dev);
+	struct net __maybe_unused *net = dev_net(in_dev->dev);
 
 	ASSERT_RTNL();
 
@@ -1643,7 +1643,7 @@  void ip_mc_down(struct in_device *in_dev)
 
 void ip_mc_init_dev(struct in_device *in_dev)
 {
-	struct net *net = dev_net(in_dev->dev);
+	struct net __maybe_unused *net = dev_net(in_dev->dev);
 	ASSERT_RTNL();
 
 #ifdef CONFIG_IP_MULTICAST
@@ -1662,7 +1662,7 @@  void ip_mc_init_dev(struct in_device *in_dev)
 void ip_mc_up(struct in_device *in_dev)
 {
 	struct ip_mc_list *pmc;
-	struct net *net = dev_net(in_dev->dev);
+	struct net __maybe_unused *net = dev_net(in_dev->dev);
 
 	ASSERT_RTNL();