From 22aaf71495570b31350c37fd0aa736551bbaa3c9 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Thu, 4 Oct 2012 16:32:22 -0700
Subject: [PATCH] NFSv4.1: Ensure that the layout sequence id stays 'close' to
 the current

Clamp the layout barrier sequence id to the current sequence id
minus the maximum number of outstanding layoutget requests.

Also ensure that we correctly initialise lo->plh_barrier if there are
no layout segments associated to this layout header.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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