From be1dd78de5686c062bb3103f9e86d444a10ed783 Mon Sep 17 00:00:00 2001
From: Eric Sandeen <sandeen@redhat.com>
Date: Thu, 8 Mar 2012 00:03:59 -0600
Subject: [PATCH] [SCSI] scsi_debug: add LBPRZ support

Add LBPRZ support to scsi_debug; i.e. read zeros for
unmapped blocks.

Rather than checking for unmapped blocks at
read time, this just zeroes them on the backing store
at unmap time so it behaves the same way.

This also adds a module parameter to disable it.

lbprz, "unmapped blocks return 0 on read (def=1)"

[jejb: fix whitespace errors]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
Reading git-format-patch failed