From 0f1b1fd86f6fd662e04da3e82a6780b226fcd0d1 Mon Sep 17 00:00:00 2001
From: Dave Chinner <dchinner@redhat.com>
Date: Tue, 22 Mar 2011 22:23:43 +1100
Subject: [PATCH] fs: pull inode->i_lock up out of writeback_single_inode

First thing we do in writeback_single_inode() is take the i_lock and
the last thing we do is drop it. A caller already holds the i_lock,
so pull the i_lock out of writeback_single_inode() to reduce the
round trips on this lock during inode writeback.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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