[TCP]: less inline's

TCP inline usage cleanup:
 * get rid of inline in several places
 * replace __inline__ with inline where possible
 * move functions used in one file out of tcp.h
 * let compiler decide on used once cases

On x86_64: 
   text	   data	    bss	    dec	    hex	filename
3594701	 648348	 567400	4810449	 4966d1	vmlinux.orig
3593133	 648580	 567400	4809113	 496199	vmlinux

On sparc64:
   text	   data	    bss	    dec	    hex	filename
2538278	 406152	 530392	3474822	 350586	vmlinux.ORIG
2536382	 406384	 530392	3473158	 34ff06	vmlinux

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 28 insertions, 0 deletions

diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c
index c7cc62c8dc12..e688c687d62d 100644
--- a/net/ipv4/tcp_cong.c
+++ b/net/ipv4/tcp_cong.c
@@ -174,6 +174,34 @@ int tcp_set_congestion_control(struct sock *sk, const char *name)
         return err;
 }
 
+
+/*
+ * Linear increase during slow start
+ */
+void tcp_slow_start(struct tcp_sock *tp)
+{
+        if (sysctl_tcp_abc) {
+                /* RFC3465: Slow Start
+                 * TCP sender SHOULD increase cwnd by the number of
+                 * previously unacknowledged bytes ACKed by each incoming
+                 * acknowledgment, provided the increase is not more than L
+                 */
+                if (tp->bytes_acked < tp->mss_cache)
+                        return;
+
+                /* We MAY increase by 2 if discovered delayed ack */
+                if (sysctl_tcp_abc > 1 && tp->bytes_acked > 2*tp->mss_cache) {
+                        if (tp->snd_cwnd < tp->snd_cwnd_clamp)
+                                tp->snd_cwnd++;
+                }
+        }
+        tp->bytes_acked = 0;
+
+        if (tp->snd_cwnd < tp->snd_cwnd_clamp)
+                tp->snd_cwnd++;
+}
+EXPORT_SYMBOL_GPL(tcp_slow_start);
+
 /*
  * TCP Reno congestion control
  * This is special case used for fallback as well.