From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 15 Mar 2014 08:05:57 +0000 (-0400)
Subject: new helper: iov_iter_get_pages()
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~45^2~54
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b2c99d15559e285384c742db52316802e24b0bd;p=pandora-kernel.git

new helper: iov_iter_get_pages()

iov_iter_get_pages(iter, pages, maxsize, &start) grabs references pinning
the pages of up to maxsize of (contiguous) data from iter.  Returns the
amount of memory grabbed or -error.  In case of success, the requested
area begins at offset start in pages[0] and runs through pages[1], etc.
Less than requested amount might be returned - either because the contiguous
area in the beginning of iterator is smaller than requested, or because
the kernel failed to pin that many pages.

direct-io.c switched to using iov_iter_get_pages()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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