From: Stefan Weinhuber <wein@de.ibm.com>
Date: Mon, 8 Mar 2010 11:26:24 +0000 (+0100)
Subject: [S390] dasd: automatic recognition of read-only devices
X-Git-Tag: v2.6.34-rc1~4^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=33b62a30f78536b976183cc764c08038ac011e0a;p=pandora-kernel.git

[S390] dasd: automatic recognition of read-only devices

In z/VM it is possible to attach a device as read-only. To prevent
unintentional write requests and subsequent I/O errors, we can detect
this configuration using the z/VM DIAG 210 interface and set the
respective linux block device to read-only as well.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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