From: Neil Brown <neilb@notabene.brown>
Date: Fri, 27 Jun 2008 22:31:41 +0000 (+1000)
Subject: Make sure all changes to md/sync_action are notified.
X-Git-Tag: v2.6.27-rc1~957^2~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72a23c211e4587859d5bf61ac4962d76e593fb02;p=pandora-kernel.git

Make sure all changes to md/sync_action are notified.

When the 'resync' thread starts or stops, when we explicitly
set sync_action, or when we determine that there is definitely nothing
to do, we notify sync_action.

To stop "sync_action" from occasionally showing the wrong value,
we introduce a new flags - MD_RECOVERY_RECOVER - to say that a
recovery is probably needed or happening, and we make sure
that we set MD_RECOVERY_RUNNING before clearing MD_RECOVERY_NEEDED.

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