Merge branches 'arm/rockchip', 'arm/exynos', 'arm/smmu', 'x86/vt-d', 'x86/amd', ...

[sfrench/cifs-2.6.git] / net / ipv4 / tcp.c

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 46efa03d2b11352913654fc336a2ad5e6b957e01..f1377f2a0472ec26e88b92be2346cbc3c8a69b41 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -402,6 +402,7 @@ void tcp_init_sock(struct sock *sk)
        tp->snd_ssthresh = TCP_INFINITE_SSTHRESH;
        tp->snd_cwnd_clamp = ~0;
        tp->mss_cache = TCP_MSS_DEFAULT;
+       u64_stats_init(&tp->syncp);
 
        tp->reordering = sysctl_tcp_reordering;
        tcp_enable_early_retrans(tp);
@@ -2598,6 +2599,7 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
        const struct tcp_sock *tp = tcp_sk(sk);
        const struct inet_connection_sock *icsk = inet_csk(sk);
        u32 now = tcp_time_stamp;
+       unsigned int start;
        u32 rate;
 
        memset(info, 0, sizeof(*info));
@@ -2665,10 +2667,11 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
        rate = READ_ONCE(sk->sk_max_pacing_rate);
        info->tcpi_max_pacing_rate = rate != ~0U ? rate : ~0ULL;
 
-       spin_lock_bh(&sk->sk_lock.slock);
-       info->tcpi_bytes_acked = tp->bytes_acked;
-       info->tcpi_bytes_received = tp->bytes_received;
-       spin_unlock_bh(&sk->sk_lock.slock);
+       do {
+               start = u64_stats_fetch_begin_irq(&tp->syncp);
+               info->tcpi_bytes_acked = tp->bytes_acked;
+               info->tcpi_bytes_received = tp->bytes_received;
+       } while (u64_stats_fetch_retry_irq(&tp->syncp, start));
 }
 EXPORT_SYMBOL_GPL(tcp_get_info);