aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/char/random.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 397c714cf2ba..af274e5a25ee 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1550,11 +1550,13 @@ __u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr,
1550 * As close as possible to RFC 793, which 1550 * As close as possible to RFC 793, which
1551 * suggests using a 250 kHz clock. 1551 * suggests using a 250 kHz clock.
1552 * Further reading shows this assumes 2 Mb/s networks. 1552 * Further reading shows this assumes 2 Mb/s networks.
1553 * For 10 Gb/s Ethernet, a 1 GHz clock is appropriate. 1553 * For 10 Mb/s Ethernet, a 1 MHz clock is appropriate.
1554 * That's funny, Linux has one built in! Use it! 1554 * For 10 Gb/s Ethernet, a 1 GHz clock should be ok, but
1555 * (Networks are faster now - should this be increased?) 1555 * we also need to limit the resolution so that the u32 seq
1556 * overlaps less than one time per MSL (2 minutes).
1557 * Choosing a clock of 64 ns period is OK. (period of 274 s)
1556 */ 1558 */
1557 seq += ktime_get_real().tv64; 1559 seq += ktime_get_real().tv64 >> 6;
1558#if 0 1560#if 0
1559 printk("init_seq(%lx, %lx, %d, %d) = %d\n", 1561 printk("init_seq(%lx, %lx, %d, %d) = %d\n",
1560 saddr, daddr, sport, dport, seq); 1562 saddr, daddr, sport, dport, seq);