From 86fe8f892013228eef324c42e77c6b54b0bbc6dd Mon Sep 17 00:00:00 2001 From: Duan Jiong Date: Wed, 3 Dec 2014 10:29:40 +0800 Subject: ipv6: remove useless spin_lock/spin_unlock xchg is atomic, so there is no necessary to use spin_lock/spin_unlock to protect it. At last, remove the redundant opt = xchg(&inet6_sk(sk)->opt, opt); statement. Signed-off-by: Duan Jiong Signed-off-by: David S. Miller --- net/ipv6/ipv6_sockglue.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) (limited to 'net/ipv6/ipv6_sockglue.c') diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index e1a9583bb419..66980d8d98d1 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -110,12 +110,8 @@ struct ipv6_txoptions *ipv6_update_options(struct sock *sk, icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); } - opt = xchg(&inet6_sk(sk)->opt, opt); - } else { - spin_lock(&sk->sk_dst_lock); - opt = xchg(&inet6_sk(sk)->opt, opt); - spin_unlock(&sk->sk_dst_lock); } + opt = xchg(&inet6_sk(sk)->opt, opt); sk_dst_reset(sk); return opt; -- cgit