From: Heinz Mauelshagen <heinzm@redhat.com>
Date: Thu, 27 Mar 2014 19:14:10 +0000 (-0400)
Subject: dm cache: remove remainder of distinct discard block size
X-Git-Tag: v3.15-rc1~69^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64ab346a360a4b15c28fb8531918d4a01f4eabd9;p=pandora-kernel.git

dm cache: remove remainder of distinct discard block size

Discard block size not being equal to cache block size causes data
corruption by erroneously avoiding migrations in issue_copy() because
the discard state is being cleared for a group of cache blocks when it
should not.

Completely remove all code that enabled a distinction between the
cache block size and discard block size.

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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