From: Michael S. Tsirkin <mst@redhat.com>
Date: Fri, 20 Apr 2018 17:22:40 +0000 (+0300)
Subject: virtio: add ability to iterate over vqs
X-Git-Tag: v4.17-rc3~25^2~4
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=24a7e4d20783c0514850f24a5c41ede46ab058f0;p=users%2Fwilly%2Flinux.git

virtio: add ability to iterate over vqs

For cleanup it's helpful to be able to simply scan all vqs and discard
all data. Add an iterator to do that.

Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 988c7355bc22..fa1b5da2804e 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -157,6 +157,9 @@ int virtio_device_freeze(struct virtio_device *dev);
 int virtio_device_restore(struct virtio_device *dev);
 #endif
 
+#define virtio_device_for_each_vq(vdev, vq) \
+	list_for_each_entry(vq, &vdev->vqs, list)
+
 /**
  * virtio_driver - operations for a virtio I/O driver
  * @driver: underlying device driver (populate name and owner).