From ce397c0616de9bfb678569f1dfa655838a711594 Mon Sep 17 00:00:00 2001
From: Liu Hui <onlyflyer@gmail.com>
Date: Mon, 1 Dec 2008 20:31:40 -0500
Subject: [PATCH] Btrfs: Fix cow semantic in run_delalloc_nocow()

The file preallocation code reversed the logic to force nodatacow.
This fixes it.
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