Re: [PATCH] virtio_net: fix use after free

From: David Miller
Date: Wed Oct 15 2014 - 16:47:34 EST

From: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Date: Wed, 15 Oct 2014 16:23:28 +0300

> You used __netif_subqueue_stopped but that seems to use
> a slightly more expensive test_bit internally.

More expensive in what sense? It should be roughly the same
as "x & y" sans the volatile.

Anyways I'm ambivalent and I want to see this bug fixes, so I'll
apply your patch.

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