From: Michael S. Tsirkin <mst@redhat.com>
Date: Tue, 14 Oct 2014 23:52:29 +0000 (+1030)
Subject: virtio-blk: drop config_mutex
X-Git-Tag: fixes-against-v3.18-rc2~57^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1f54b0c055b9322f4e7acb49c492edc5accd15ae;p=pandora-kernel.git

virtio-blk: drop config_mutex

config_mutex served two purposes: prevent multiple concurrent config
change handlers, and synchronize access to config_enable flag.

Since commit dbf2576e37da0fcc7aacbfbb9fd5d3de7888a3c1
    workqueue: make all workqueues non-reentrant
all workqueues are non-reentrant, and config_enable
is now gone.

Get rid of the unnecessary lock.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---

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