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udp: use atomic_inc_not_zero_hint

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UDP sockets refcount is usually 2, unless an incoming frame is going to
be queued in receive or backlog queue.

Using atomic_inc_not_zero_hint() permits to reduce latency, because
processor issues less memory transactions.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2010-11-15 19:58:26 +00:00
committed by David S. Miller
parent 213b15ca81
commit c31504dc0d
3 changed files with 5 additions and 5 deletions
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2
include/net/sock.h
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@@ -57,7 +57,7 @@
#include <linux/rculist_nulls.h>
#include <linux/poll.h>
#include <asm/atomic.h>
#include <linux/atomic.h>
#include <net/dst.h>
#include <net/checksum.h>