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Date:	Tue, 8 Dec 2015 14:35:34 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'David Miller' <davem@...emloft.net>,
	"eric.dumazet@...il.com" <eric.dumazet@...il.com>
CC:	"davej@...emonkey.org.uk" <davej@...emonkey.org.uk>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: 4.4-rc2 xfrm_lookup kasan trace

From: Of David Miller
> Sent: 03 December 2015 16:59
> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Mon, 30 Nov 2015 17:22:11 -0800
> 
> > @@ -2198,6 +2198,7 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
> >  	xdst = NULL;
> >  	route = NULL;
> >
> > +	sk = sk_to_full_sk((struct sock *)sk);
> 
> The war against const...
> 
> I know this is the only instance where const is input, but you may want to
> consider adding the const verion of the helper anyways to avoid ugly casts
> like this.

In that case you could use something like:

#define SK_TO_FULL_SK(sk) (typeof (sk))sk_to_full_sk(sk))

With the helper arg and result being 'const struct sock *'.

	David
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