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| author | Mark Brown <broonie@kernel.org> | 2015-01-07 17:30:17 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-01-07 17:30:17 +0000 |
| commit | 1285c3fefaddedf5358f52cfde3c2b64d8086a04 (patch) | |
| tree | 361f556d6b400e8cb6d16738142db2f69f63ef2f /include/uapi/linux/virtio_ring.h | |
| parent | 6b038c8d2b99b552f0b025c8a134f8a3c417a3e7 (diff) | |
| parent | b1940cd21c0f4abdce101253e860feff547291b0 (diff) | |
Merge tag 'v3.19-rc3' into spi-sh-msiof
Linux 3.19-rc3
Diffstat (limited to 'include/uapi/linux/virtio_ring.h')
| -rw-r--r-- | include/uapi/linux/virtio_ring.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/uapi/linux/virtio_ring.h b/include/uapi/linux/virtio_ring.h index 61c818a7fe70..a3318f31e8e7 100644 --- a/include/uapi/linux/virtio_ring.h +++ b/include/uapi/linux/virtio_ring.h @@ -101,6 +101,13 @@ struct vring { struct vring_used *used; }; +/* Alignment requirements for vring elements. + * When using pre-virtio 1.0 layout, these fall out naturally. + */ +#define VRING_AVAIL_ALIGN_SIZE 2 +#define VRING_USED_ALIGN_SIZE 4 +#define VRING_DESC_ALIGN_SIZE 16 + /* The standard layout for the ring is a continuous chunk of memory which looks * like this. We assume num is a power of 2. * |