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hw/virtio: Document virtio_queue_packed_empty_rcu is called within RCU 

While virtio_queue_packed_empty_rcu() uses the '_rcu' suffix,
it is not obvious it is called within rcu_read_lock(). All other
functions from this file called with the RCU locked have a comment
describing it. Document this one similarly for consistency.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210826172658.2116840-2-philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2021-08-26 19:26:56 +02:00 committed by Michael S. Tsirkin
parent c2ea98c317
commit 7f51beddad
1 changed files with 1 additions and 0 deletions
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hw/virtio/virtio.c
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@ -634,6 +634,7 @@ static int virtio_queue_split_empty(VirtQueue *vq)
return empty; return empty;
} }
/* Called within rcu_read_lock(). */
static int virtio_queue_packed_empty_rcu(VirtQueue *vq) static int virtio_queue_packed_empty_rcu(VirtQueue *vq)
{ {
struct VRingPackedDesc desc; struct VRingPackedDesc desc;