From: Mike Snitzer <snitzer@redhat.com>
Date: Mon, 24 May 2010 07:07:32 +0000 (+0200)
Subject: block: Adjust elv_iosched_show to return "none" for bio-based DM
X-Git-Tag: v2.6.35-rc2~12^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e36f724b4ae70e443a7d152929b60059cbfa1a26;p=pandora-kernel.git

block: Adjust elv_iosched_show to return "none" for bio-based DM

Bio-based DM doesn't use an elevator (queue is !blk_queue_stackable()).

Longer-term DM will not allocate an elevator for bio-based DM.  But even
then there will be small potential for an elevator to be allocated for
a request-based DM table only to have a bio-based table be loaded in the
end.

Displaying "none" for bio-based DM will help avoid user confusion.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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