From bb289b7be62db84b9630ce00367444c810cada2c Mon Sep 17 00:00:00 2001
From: Omar Sandoval <osandov@osandov.com>
Date: Mon, 18 May 2015 02:16:29 -0700
Subject: [PATCH] Btrfs: fail on mismatched subvol and subvolid mount options

There's nothing to stop a user from passing both subvol= and subvolid=
to mount, but if they don't refer to the same subvolume, someone is
going to be surprised at some point. Error out on this case, but allow
users to pass in both if they do match (which they could, for example,
get out of /proc/mounts).

Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Reading git-format-patch failed