From 6e2631463f3a2ce430a295c68aead3ff228ca3cf Mon Sep 17 00:00:00 2001
From: Dmitry Monakhov <dmonakhov@openvz.org>
Date: Sun, 27 Jul 2014 22:32:27 -0400
Subject: [PATCH] ext4: fix incorrect locking in move_extent_per_page

If we have to copy data we must drop i_data_sem because of
get_blocks() will be called inside mext_page_mkuptodate(), but later we must
reacquire it again because we are about to change extent's tree

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
---
Reading git-format-patch failed