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authorSasha Levin <levinsasha928@gmail.com>2011-08-14 10:52:32 -0400
committerRusty Russell <rusty@rustcorp.com.au>2011-11-01 21:10:58 -0400
commit3ead6f4d42e2866a48d7abf9bc98553f1110b6df (patch)
treedb9bcecd8d232b0f3b9fb14589c58a872c400539 /include/linux/virtio_config.h
parent51c6d61ac58844b5e3e0d28271084c06f6a15371 (diff)
virtio_config: Add virtio_config_val_len()
This patch adds virtio_config_val_len() which allows retrieving variable length data from the virtio config space only if a specific feature is on. Cc: Amit Shah <amit.shah@redhat.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: virtualization@lists.linux-foundation.org Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/virtio_config.h')
-rw-r--r--include/linux/virtio_config.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 39c88c5ad19d..add4790b21fe 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -155,6 +155,9 @@ static inline bool virtio_has_feature(const struct virtio_device *vdev,
155#define virtio_config_val(vdev, fbit, offset, v) \ 155#define virtio_config_val(vdev, fbit, offset, v) \
156 virtio_config_buf((vdev), (fbit), (offset), (v), sizeof(*v)) 156 virtio_config_buf((vdev), (fbit), (offset), (v), sizeof(*v))
157 157
158#define virtio_config_val_len(vdev, fbit, offset, v, len) \
159 virtio_config_buf((vdev), (fbit), (offset), (v), (len))
160
158static inline int virtio_config_buf(struct virtio_device *vdev, 161static inline int virtio_config_buf(struct virtio_device *vdev,
159 unsigned int fbit, 162 unsigned int fbit,
160 unsigned int offset, 163 unsigned int offset,