diff options
Diffstat (limited to 'include/linux/virtio.h')
| -rw-r--r-- | include/linux/virtio.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 260d1fcf29a4..12c18ac1b973 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h | |||
| @@ -43,8 +43,9 @@ struct virtqueue | |||
| 43 | * vq: the struct virtqueue we're talking about. | 43 | * vq: the struct virtqueue we're talking about. |
| 44 | * @enable_cb: restart callbacks after disable_cb. | 44 | * @enable_cb: restart callbacks after disable_cb. |
| 45 | * vq: the struct virtqueue we're talking about. | 45 | * vq: the struct virtqueue we're talking about. |
| 46 | * This returns "false" (and doesn't re-enable) if there are pending | 46 | * This re-enables callbacks; it returns "false" if there are pending |
| 47 | * buffers in the queue, to avoid a race. | 47 | * buffers in the queue, to detect a possible race between the driver |
| 48 | * checking for more work, and enabling callbacks. | ||
| 48 | * | 49 | * |
| 49 | * Locking rules are straightforward: the driver is responsible for | 50 | * Locking rules are straightforward: the driver is responsible for |
| 50 | * locking. No two operations may be invoked simultaneously. | 51 | * locking. No two operations may be invoked simultaneously. |