[TCP]: Add tcp_dec_pcount_approx int variant

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 9 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 3abe22e4b576..3c8c8e7f6f6d 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -740,22 +740,16 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
                 if (diff > 0) {
                         /* Adjust Reno SACK estimate. */
                         if (!tp->rx_opt.sack_ok) {
-                                tp->sacked_out -= diff;
-                                if ((int)tp->sacked_out < 0)
-                                        tp->sacked_out = 0;
+                                tcp_dec_pcount_approx_int(&tp->sacked_out, diff);
                                 tcp_sync_left_out(tp);
                         }
 
-                        tp->fackets_out -= diff;
-                        if ((int)tp->fackets_out < 0)
-                                tp->fackets_out = 0;
+                        tcp_dec_pcount_approx_int(&tp->fackets_out, diff);
                         /* SACK fastpath might overwrite it unless dealt with */
                         if (tp->fastpath_skb_hint != NULL &&
                             after(TCP_SKB_CB(tp->fastpath_skb_hint)->seq,
                                   TCP_SKB_CB(skb)->seq)) {
-                                tp->fastpath_cnt_hint -= diff;
-                                if ((int)tp->fastpath_cnt_hint < 0)
-                                        tp->fastpath_cnt_hint = 0;
+                                tcp_dec_pcount_approx_int(&tp->fastpath_cnt_hint, diff);
                         }
                 }
         }