dccp: ccid2.c, ccid3.c use clamp(), clamp_t()

Makes the intention of the nested min/max clear.
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/dccp/ccids/ccid2.c

@@ -716,7 +716,7 @@ static int ccid2_hc_tx_init(struct ccid *ccid, struct sock *sk)
 	 * packets for new connections, following the rules from [RFC3390]".
 	 * We need to convert the bytes of RFC3390 into the packets of RFC 4341.
 	 */
-	hctx->ccid2hctx_cwnd = min(4U, max(2U, 4380U / dp->dccps_mss_cache));
+	hctx->ccid2hctx_cwnd = clamp(4380U / dp->dccps_mss_cache, 2U, 4U);
 
 	/* Make sure that Ack Ratio is enabled and within bounds. */
 	max_ratio = DIV_ROUND_UP(hctx->ccid2hctx_cwnd, 2);

net/dccp/ccids/ccid3.c

@@ -88,8 +88,8 @@ static void ccid3_hc_tx_set_state(struct sock *sk,
 static inline u64 rfc3390_initial_rate(struct sock *sk)
 {
 	const struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
-	const __u32 w_init = min_t(__u32, 4 * hctx->ccid3hctx_s,
-				   max_t(__u32, 2 * hctx->ccid3hctx_s, 4380));
+	const __u32 w_init = clamp_t(__u32, 4380U,
+			2 * hctx->ccid3hctx_s, 4 * hctx->ccid3hctx_s);
 
 	return scaled_div(w_init << 6, hctx->ccid3hctx_rtt);
 }