[PATCH] netfilter: nat: avoid unused-variable warning

[PATCH] netfilter: nat: avoid unused-variable warning

[Arnd Bergmann]

masq_refcnt6 was added at the start of the file, but it is
only used in the option IPv6 section of the file, causing
a harmless compiler warning if IPv6 is disabled:

net/netfilter/nf_nat_masquerade.c:15:21: error: 'masq_refcnt6' defined but not used [-Werror=unused-variable]
 static unsigned int masq_refcnt6 __read_mostly;

Move the variable next to the user to avoid that warning.

Fixes: 46f7487e161b ("netfilter: nat: don't register device notifier twice")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
----
This is an older patch stack, for some reason I seem to have never
sent it, and I can't find any indication of anyone else sending
a similar fix, so sending this out now.

If it's already fixed upstream, please ignore.
---
 net/netfilter/nf_nat_masquerade.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nf_nat_masquerade.c b/net/netfilter/nf_nat_masquerade.c
index d85c4d902e7b..878a73b4f65c 100644
--- a/net/netfilter/nf_nat_masquerade.c
+++ b/net/netfilter/nf_nat_masquerade.c
@@ -12,7 +12,6 @@
 
 static DEFINE_MUTEX(masq_mutex);
 static unsigned int masq_refcnt4 __read_mostly;
-static unsigned int masq_refcnt6 __read_mostly;
 
 unsigned int
 nf_nat_masquerade_ipv4(struct sk_buff *skb, unsigned int hooknum,
@@ -322,6 +321,8 @@ static struct notifier_block masq_inet6_notifier = {
 	.notifier_call	= masq_inet6_event,
 };
 
+static unsigned int masq_refcnt6 __read_mostly;
+
 int nf_nat_masquerade_ipv6_register_notifier(void)
 {
 	int ret = 0;
-- 
2.20.0

Re: [PATCH] netfilter: nat: avoid unused-variable warning

[Pablo Neira Ayuso]

On Mon, Mar 25, 2019 at 02:53:05PM +0100, Arnd Bergmann wrote:
> masq_refcnt6 was added at the start of the file, but it is
> only used in the option IPv6 section of the file, causing
> a harmless compiler warning if IPv6 is disabled:
> 
> net/netfilter/nf_nat_masquerade.c:15:21: error: 'masq_refcnt6' defined but not used [-Werror=unused-variable]
>  static unsigned int masq_refcnt6 __read_mostly;
> 
> Move the variable next to the user to avoid that warning.
> 
> Fixes: 46f7487e161b ("netfilter: nat: don't register device notifier twice")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ----
> This is an older patch stack, for some reason I seem to have never
> sent it, and I can't find any indication of anyone else sending
> a similar fix, so sending this out now.
> 
> If it's already fixed upstream, please ignore.

Yes, Florian fixed this in nf-next.