diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/virtio.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 057a2e010758..f508c651e53d 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h | |||
@@ -51,6 +51,9 @@ struct virtqueue { | |||
51 | * This re-enables callbacks; it returns "false" if there are pending | 51 | * This re-enables callbacks; it returns "false" if there are pending |
52 | * buffers in the queue, to detect a possible race between the driver | 52 | * buffers in the queue, to detect a possible race between the driver |
53 | * checking for more work, and enabling callbacks. | 53 | * checking for more work, and enabling callbacks. |
54 | * @detach_unused_buf: detach first unused buffer | ||
55 | * vq: the struct virtqueue we're talking about. | ||
56 | * Returns NULL or the "data" token handed to add_buf | ||
54 | * | 57 | * |
55 | * Locking rules are straightforward: the driver is responsible for | 58 | * Locking rules are straightforward: the driver is responsible for |
56 | * locking. No two operations may be invoked simultaneously, with the exception | 59 | * locking. No two operations may be invoked simultaneously, with the exception |
@@ -71,6 +74,7 @@ struct virtqueue_ops { | |||
71 | 74 | ||
72 | void (*disable_cb)(struct virtqueue *vq); | 75 | void (*disable_cb)(struct virtqueue *vq); |
73 | bool (*enable_cb)(struct virtqueue *vq); | 76 | bool (*enable_cb)(struct virtqueue *vq); |
77 | void *(*detach_unused_buf)(struct virtqueue *vq); | ||
74 | }; | 78 | }; |
75 | 79 | ||
76 | /** | 80 | /** |