From: Michael S. Tsirkin <mst@redhat.com>
Date: Mon, 31 Oct 2011 07:05:36 +0000 (+0100)
Subject: virtio-blk: use ida to allocate disk index
X-Git-Tag: v3.2-rc1~48^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a0eda62552eba4e1f92d5354bb65c68fb6b45f87;p=pandora-kernel.git

virtio-blk: use ida to allocate disk index

Based on a patch by Mark Wu <dwu@redhat.com>

Current index allocation in virtio-blk is based on a monotonically
increasing variable "index". This means we'll run out of numbers
after a while.  It also could cause confusion about the disk
name in the case of hot-plugging disks.
Change virtio-blk to use ida to allocate index, instead.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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