linux-kernel - Re: [PATCH v3 1/4] block: refactor iov_count_pages() from bio_{copy,map}_user

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Message-ID: <20150424070611.GA8648@infradead.org>
Date:	Fri, 24 Apr 2015 00:06:11 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Ming Lin <mlin@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Kent Overstreet <kent.overstreet@...il.com>,
	Jens Axboe <axboe@...nel.dk>,
	Dongsu Park <dongsu.park@...fitbricks.com>,
	"Hans J. Koch" <hjk@...sjkoch.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v3 1/4] block: refactor iov_count_pages() from
 bio_{copy,map}_user_iov()

On Thu, Apr 23, 2015 at 04:04:32PM -0700, Ming Lin wrote:
> From: Kent Overstreet <kent.overstreet@...il.com>
> 
> Refactor the common part in bio_copy_user_iov() and
> __bio_map_user_iov() to separate out iov_count_pages() into the general
> iov_iter API, instead of open coding iov iterations as done previously.
> 
> This commit should contain only literal replacements, without
> functional changes.


Weve already got a iov_iter_npages and iov_iter_alignment,
the SG_IO code should probably be switched to those instead.
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