linux-kernel - [PATCH] net: netfilter: fix GCC uninitialized warning

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Message-Id: <1446835694-6967-1-git-send-email-0x7f454c46@gmail.com>
Date:	Fri,  6 Nov 2015 21:48:14 +0300
From:	Dmitry Safonov <0x7f454c46@...il.com>
To:	pablo@...filter.org, kaber@...sh.net, kadlec@...ckhole.kfki.hu,
	davem@...emloft.net
Cc:	netfilter-devel@...r.kernel.org, coreteam@...filter.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dmitry Safonov <0x7f454c46@...il.com>
Subject: [PATCH] net: netfilter: fix GCC uninitialized warning

With x86_64_defconfig:
GCC thinks that in nfulnl_recv_config flags parameter is not inited but
it was under the same condition (nfula[NFULA_CFG_FLAGS] == true).
Suppress this warning:
	net/netfilter/nfnetlink_log.c: In function ‘nfulnl_recv_config’:
	net/netfilter/nfnetlink_log.c:320:14: warning: ‘flags’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  	inst->flags = flags;
	            ^
Signed-off-by: Dmitry Safonov <0x7f454c46@...il.com>
---
 net/netfilter/nfnetlink_log.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 06eb48fceb42e4..d65f3b987b7f13 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -825,7 +825,7 @@ nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
 	struct net *net = sock_net(ctnl);
 	struct nfnl_log_net *log = nfnl_log_pernet(net);
 	int ret = 0;
-	u16 flags;
+	u16 flags = 0; /* GCC uninitialized */
 
 	if (nfula[NFULA_CFG_CMD]) {
 		u_int8_t pf = nfmsg->nfgen_family;
-- 
2.6.2

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