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[NET] Add barriers for dst refcnt

To: "David S. Miller" <davem@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxx
Subject: [NET] Add barriers for dst refcnt
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 4 Feb 2005 18:33:11 +1100
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Mutt/1.5.6+20040722i
Hi Dave:

In light of the recent discussion about sk_buff, I think we need
the following patch for dst_entry.  This adds a memory barrier
before dst_release drops the refcnt, and a read memory barrier
before dst_destroy starts destroying the entry.

Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

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