From: Nick Piggin <npiggin@suse.de>
Date: Wed, 26 May 2010 13:41:14 +0000 (+0200)
Subject: brd: support discard
X-Git-Tag: v2.6.35-rc2~12^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b7c335713ea130d707c22d7f7c57a8eca75ded7e;p=pandora-kernel.git

brd: support discard

Support discard requests in brd by zeroing or deleting the underlying backing
pages. This is simply to help with testing and documentation nature of
brd code.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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