From e6f810759505bc86c009854b82cc495ffd8eb020 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Thu, 24 Jan 2008 18:14:34 -0500
Subject: [PATCH] NFS: Add an asynchronous delegreturn operation for use in
 nfs_clear_inode

Otherwise, there is a potential deadlock if the last dput() from an NFSv4
close() or other asynchronous operation leads to nfs_clear_inode calling
the synchronous delegreturn.

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