From d0b9875d65c1abcc9d405d648660dfb919353959 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@infradead.org>
Date: Thu, 14 Nov 2013 08:50:33 -0800
Subject: [PATCH] nfs: take i_mutex during direct I/O reads

We'll need the i_mutex to prevent i_dio_count from incrementing while
truncate is waiting for it to reach zero, and protects against having
the pagecache repopulated after we flushed it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
Reading git-format-patch failed