From: Alex Elder <elder@inktank.com>
Date: Mon, 14 Jan 2013 18:43:31 +0000 (-0600)
Subject: rbd: define flags field, use it for exists flag
X-Git-Tag: v3.9-rc1~41^2~21^2~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d292906f80170f4647079dd503df18b737750af;p=pandora-kernel.git

rbd: define flags field, use it for exists flag

Define a new rbd device flags field, manipulated using bit
operations.  Replace the use of the current "exists" flag with a bit
in this new "flags" field.  Add a little commentary about the
"exists" flag, which does not need to be manipulated atomically.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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