linux-kernel - Re: [PATCH v2 3/7] block: refactor iov_count_pages() from bio_{copy,map}_user

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Message-ID: <20150116114146.GA31449@infradead.org>
Date:	Fri, 16 Jan 2015 03:41:46 -0800
From:	Christoph Hellwig <hch@...radead.org>
To:	Dongsu Park <dongsu.park@...fitbricks.com>
Cc:	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Kent Overstreet <kmo@...erainc.com>,
	Jens Axboe <axboe@...nel.dk>,
	"Hans J. Koch" <hjk@...sjkoch.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v2 3/7] block: refactor iov_count_pages() from
 bio_{copy,map}_user_iov()

mm/iov_iter.c already has a iov_iter_npages, although that
one doesn't do an alignment check yet.  But it might be worth
to just the iov_iter_alignment similar to how iov_iter_alignment
does it instead of this new function.
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