From 962bd40bc30e412828e091bfda041b7547e779c8 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@poochiereds.net>
Date: Tue, 10 Jun 2014 12:24:40 -0400
Subject: [PATCH] locks: add missing memory barrier in break_deleg

break_deleg is subject to the same potential race as break_lease. Add
a memory barrier to prevent it.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
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