From 4022abf4498186de2e893ce614333216f2add461 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Tue, 2 Dec 2008 09:57:03 -0500
Subject: [PATCH] Btrfs: delete unused function: btrfs_invalidate_dcache_root

Snapshot and subvolume creation no longer need this helper.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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