From edd1400be9f983f521c7397740d810fa210ee52f Mon Sep 17 00:00:00 2001
From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 27 Jun 2013 18:51:00 +0800
Subject: [PATCH] Btrfs: fix several potential problems in
 copy_nocow_pages_for_inode

- It makes no sense that we deal with a inode in the dead tree.
- fix the race between dio and page copy by waiting the dio completion
- avoid the page copy vs truncate/punch hole
- check if the page is in the page cache or not

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---
Reading git-format-patch failed