From: Mike Snitzer <snitzer@redhat.com>
Date: Wed, 8 Sep 2010 16:07:01 +0000 (+0200)
Subject: dm: convey that all flushes are processed as empty
X-Git-Tag: v2.6.37-rc1~166^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b372d360df6deaf79a58a02fa0cc0d7e0aa3e92f;p=pandora-kernel.git

dm: convey that all flushes are processed as empty

Rename __clone_and_map_flush to __clone_and_map_empty_flush for added
clarity.

Simplify logic associated with REQ_FLUSH conditionals.

Introduce a BUG_ON() and add a few more helpful comments to the code
so that it is clear that all flushes are empty.

Cleanup __split_and_process_bio() so that an empty flush isn't processed
by a 'sector_count' focused while loop.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---

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