From 4e59ca7da05f0d5d3ad40365c502c8b0fd24c7e3 Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Sat, 12 Dec 2009 21:17:06 -0700
Subject: [PATCH] md: rcu_read_lock() walk of mddev->disks in md_do_sync()

Other walks of this list are either under rcu_read_lock() or the list
mutation lock (mddev_lock()).  This protects against the improbable case of a
disk being removed from the array at the start of md_do_sync().

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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