MD: change the parameter of md thread
authorShaohua Li <shli@kernel.org>
Thu, 11 Oct 2012 02:34:00 +0000 (13:34 +1100)
committerNeilBrown <neilb@suse.de>
Thu, 11 Oct 2012 02:34:00 +0000 (13:34 +1100)
Change the thread parameter, so the thread can carry extra info. Next patch
will use it.

Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: NeilBrown <neilb@suse.de>

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