From 2b0ce2c2909368d124a78a88e5c7106fdcba6221 Mon Sep 17 00:00:00 2001
From: Mitch Harder <mitch.harder@sabayonlinux.org>
Date: Tue, 24 Jul 2012 11:58:43 -0600
Subject: [PATCH] Btrfs: Check INCOMPAT flags on remount and add helper
 function

In support of the recently added capability to remount with lzo
compression, provide a helper function to check the compression
INCOMPAT flags when remounting with lzo compression, and set
the flags if necessary.

Also, implement the new helper function when defragmenting with
explicit lzo compression and when setting the default subvolume.

Signed-off-by: Mitch Harder <mitch.harder@sabayonlinux.org>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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