From: NeilBrown <neilb@suse.de>
Date: Tue, 31 Mar 2009 04:15:05 +0000 (+1100)
Subject: md: add explicit method to signal the end of a reshape.
X-Git-Tag: v2.6.30-rc1~241^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cea9c22800773cecb1d41f4a6139f9eb6a95368b;p=pandora-kernel.git

md: add explicit method to signal the end of a reshape.

Currently raid5 (the only module that supports restriping)
notices that the reshape has finished be sync_request being
given a large value, and handles any cleanup them.

This patch changes it so md_check_recovery calls into an
explicit finish_reshape method as well.

The clean-up from sync_request can do things that need to be
done promptly, typically things local to the raid5_conf_t
structure.

The "finish_reshape" method is called under the mddev_lock
so it can do things involving reconfiguring the device.

This allows us to get rid of md_set_array_sectors_locked, which
would have caused a deadlock if you tried to stop and array
while a reshape was happening.

Signed-off-by: NeilBrown <neilb@suse.de>
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