From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 4 Apr 2014 16:15:19 +0000 (-0400)
Subject: lustre: get rid of messing with iovecs
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~45^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b42b15fdad3ebb790250041d1517acebb9bd56d9;p=pandora-kernel.git

lustre: get rid of messing with iovecs

* switch to ->read_iter/->write_iter
* keep a pointer to iov_iter instead of iov/nr_segs
* do not modify iovecs; use iov_iter_truncate()/iov_iter_advance() and
a new primitive - iov_iter_reexpand() (expand previously truncated
iterator) istead.
* (racy) check for lustre VMAs intersecting with iovecs kept for now as
for_each_iov() loop.

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