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authorHerbert Xu <herbert@gondor.apana.org.au>2006-05-27 23:03:58 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-17 21:28:37 -0700
commit546be2405be119ef55467aace45f337a16e5d424 (patch)
tree9b09f0041f9f82a20ab25ace3c7360e4a4b7989f /net/ipv6/xfrm6_mode_transport.c
parent[TG3]: update version and reldate (diff)
downloadlinux-dev-546be2405be119ef55467aace45f337a16e5d424.tar.xz
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[IPSEC] xfrm: Undo afinfo lock proliferation
The number of locks used to manage afinfo structures can easily be reduced down to one each for policy and state respectively. This is based on the observation that the write locks are only held by module insertion/removal which are very rare events so there is no need to further differentiate between the insertion of modules like ipv6 versus esp6. The removal of the read locks in xfrm4_policy.c/xfrm6_policy.c might look suspicious at first. However, after you realise that nobody ever takes the corresponding write lock you'll feel better :) As far as I can gather it's an attempt to guard against the removal of the corresponding modules. Since neither module can be unloaded at all we can leave it to whoever fixes up IPv6 unloading :) Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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