netdev - Re: [PATCH 1/7] xfrm: remove policy lock when accessing policy->walk.dead

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Message-ID: <20100329144339.GA26214@gondor.apana.org.au>
Date:	Mon, 29 Mar 2010 22:43:39 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Timo Teras <timo.teras@....fi>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 1/7] xfrm: remove policy lock when accessing
	policy->walk.dead

On Mon, Mar 29, 2010 at 05:12:38PM +0300, Timo Teras wrote:
>
> @@ -1132,7 +1119,7 @@ int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol)
>  		__xfrm_policy_link(pol, XFRM_POLICY_MAX+dir);
>  	}
>  	if (old_pol)
> -		__xfrm_policy_unlink(old_pol, XFRM_POLICY_MAX+dir);
> +		old_pol = __xfrm_policy_unlink(old_pol, XFRM_POLICY_MAX+dir);
>  	write_unlock_bh(&xfrm_policy_lock);
>  
>  	if (old_pol) {

So when can this actually fail?

Otherwise this patch looks good to me.

Thanks,
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