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net: Use __this_cpu_inc() in fast path

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This patch saves 224 bytes of text on my machine.

__this_cpu_inc() generates a single instruction, using no scratch
registers :

  65 ff 04 25 a8 30 01 00      incl   %gs:0x130a8

instead of :

  48 c7 c2 80 30 01 00         mov    $0x13080,%rdx
  65 48 8b 04 25 88 ea 00 00   mov    %gs:0xea88,%rax
  83 44 10 28 01               addl   $0x1,0x28(%rax,%rdx,1)

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
2010-05-19 22:07:23 +00:00
committed by David S. Miller
parent 604c1b1868
commit 27f39c73e6
2 changed files with 2 additions and 4 deletions
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3
net/core/dev.c
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@@ -2822,8 +2822,7 @@ static int __netif_receive_skb(struct sk_buff *skb)
skb->dev = master;
}
__get_cpu_var(softnet_data).processed++;
__this_cpu_inc(softnet_data.processed);
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
skb->mac_len = skb->network_header - skb->mac_header;