From f67da30c1d5fc9e341bc8121708874bfd7b31e45 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 19 Mar 2014 01:16:16 -0400
Subject: [PATCH] new helper: iov_iter_npages()

counts the pages covered by iov_iter, up to given limit.
do_block_direct_io() and fuse_iter_npages() switched to
it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Reading git-format-patch failed