From 4891aca2dac612a2f21a3278d9906ade13b55788 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.cz>
Date: Tue, 19 Apr 2011 16:45:00 +0200
Subject: [PATCH] btrfs: fix dereference before check

The superblock's ->s_fs_info is properly set in btrfs_fill_super, after
a call to open_ctree, which derefereces it before check. Although
tree_root is set via btrfs_set_super, let's be defensive and leave the
check in place.

Signed-off-by: David Sterba <dsterba@suse.cz>
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