pkt_sched: gen_estimator: Fix signed integers right-shifts.

Right-shifts of signed integers are implementation-defined so unportable.

With feedback from: Eric Dumazet <dada1@cosmosbay.com>

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/gen_estimator.c b/net/core/gen_estimator.c
index 6d62d4618cfc66a5c106e331b3eca0e85ff41f28..78e5bfc454ae00e627705515cbd857cd3d9c67d9 100644 (file)
--- a/net/core/gen_estimator.c
+++ b/net/core/gen_estimator.c
@@ -128,12 +128,12 @@ static void est_timer(unsigned long arg)
                npackets = e->bstats->packets;
                brate = (nbytes - e->last_bytes)<<(7 - idx);
                e->last_bytes = nbytes;
-               e->avbps += ((s64)(brate - e->avbps)) >> e->ewma_log;
+               e->avbps += (brate >> e->ewma_log) - (e->avbps >> e->ewma_log);
                e->rate_est->bps = (e->avbps+0xF)>>5;
 
                rate = (npackets - e->last_packets)<<(12 - idx);
                e->last_packets = npackets;
-               e->avpps += ((long)rate - (long)e->avpps) >> e->ewma_log;
+               e->avpps += (rate >> e->ewma_log) - (e->avpps >> e->ewma_log);
                e->rate_est->pps = (e->avpps+0x1FF)>>10;
 skip:
                read_unlock(&est_lock);