From 40f90271a835478e5910dc84f32b8e25885419a4 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Thu, 1 Oct 2015 11:36:38 -0400
Subject: [PATCH] NFS: Fix up page writeback accounting

Currently, we are crediting all the calls to nfs_writepages_callback()
(i.e. the nfs_writepages() callback) to nfs_writepage(). Aside from
being inconsistent with the behaviour of the equivalent readpage/readpages
accounting, this also means that we cannot distinguish between bulk writes
and single page writebacks (which confuses the 'nfsiostat -p' tool).

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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