netdev - Re: [PATCH 08/17] {macvtap,tun}_get_user(): switch to iov

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Message-ID: <1416791172.7215.68.camel@decadent.org.uk>
Date:	Mon, 24 Nov 2014 01:06:12 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	David Miller <davem@...emloft.net>, torvalds@...ux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	target-devel@...r.kernel.org, nab@...ux-iscsi.org,
	hch@...radead.org
Subject: Re: [PATCH 08/17] {macvtap,tun}_get_user(): switch to iov_iter

On Mon, 2014-11-24 at 00:27 +0000, Ben Hutchings wrote:
> On Sat, 2014-11-22 at 04:33 +0000, Al Viro wrote:
[...]
> Does skb_copy_datagram_from_iter() really need a len parameter?  Here it
> is equal to iov_iter_count(from).
[...]
> Again len is equal to iov_iter_count(from), so I think that parameter is
> redundant.

Having read further patches, I see that unix_stream_sendmsg() is the one
exception where the length parameter is different.  But maybe the common
case (len = iter_iov_count(iov)) deserves a wrapper function?

Ben.

-- 
Ben Hutchings
Absolutum obsoletum. (If it works, it's out of date.) - Stafford Beer

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