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mptcp: Remove set but not used variable 'can_ack'

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Fixes gcc '-Wunused-but-set-variable' warning:

net/mptcp/options.c: In function 'mptcp_established_options_dss':
net/mptcp/options.c:338:7: warning:
 variable 'can_ack' set but not used [-Wunused-but-set-variable]

commit dc093db5cc ("mptcp: drop unneeded checks")
leave behind this unused, remove it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YueHaibing 2020-03-18 02:01:57 +00:00 committed by David S. Miller
parent c388b935d0
commit 09984483db
1 changed files with 0 additions and 2 deletions
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net/mptcp/options.c
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@ -335,7 +335,6 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
struct mptcp_sock *msk;
unsigned int ack_size;
bool ret = false;
bool can_ack;
u8 tcp_fin;
if (skb) {
@ -364,7 +363,6 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb,
/* passive sockets msk will set the 'can_ack' after accept(), even
* if the first subflow may have the already the remote key handy
*/
can_ack = true;
opts->ext_copy.use_ack = 0;
msk = mptcp_sk(subflow->conn);
if (!READ_ONCE(msk->can_ack)) {