virtio: fix balloon without VIRTIO_BALLOON_F_STATS_VQ
authorRusty Russell <rusty@rustcorp.com.au>
Wed, 24 Feb 2010 20:22:14 +0000 (14:22 -0600)
committerRusty Russell <rusty@rustcorp.com.au>
Wed, 24 Feb 2010 03:52:17 +0000 (13:52 +1030)
commit169c246a30808588436794e96a97c61a01af9bed
treecce7c1e1ca52687f711a18f46ea741841f43ea34
parent1f34c71afe5115e77a49c4e67720a66e27053e54
virtio: fix balloon without VIRTIO_BALLOON_F_STATS_VQ

When running under qemu-kvm-0.11.0:

BUG: unable to handle kernel paging request at 56e58955
...
Process vballoon (pid: 1297, ti=c7976000 task=c70a6ca0 task.ti=c7
...
Call Trace:
 [<c88253a3>] ? balloon+0x1b3/0x440 [virtio_balloon]
 [<c041c2d7>] ? schedule+0x327/0x9d0
 [<c88251f0>] ? balloon+0x0/0x440 [virtio_balloon]
 [<c014a2d4>] ? kthread+0x74/0x80
 [<c014a260>] ? kthread+0x0/0x80
 [<c0103b36>] ? kernel_thread_helper+0x6/0x30

need_stats_update should be zero-initialized.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Adam Litke <agl@us.ibm.com>
drivers/virtio/virtio_balloon.c