From: Milan Broz <mbroz@redhat.com>
Date: Tue, 6 Jan 2009 03:05:04 +0000 (+0000)
Subject: dm ioctl: allow dm_copy_name_and_uuid to return only one field
X-Git-Tag: v2.6.29-rc1~492^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23d39f63aa87e812fd879b8bc32ee6ccfe733de3;p=pandora-kernel.git

dm ioctl: allow dm_copy_name_and_uuid to return only one field

Allow NULL buffer in dm_copy_name_and_uuid if you only want to return one of
the fields.

(Required by a following patch that adds these fields to sysfs.)

Signed-off-by: Milan Broz <mbroz@redhat.com>
Reviewed-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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