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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-02-10 10:26:38 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-02-10 10:26:38 +0000 |
| commit | df9ab9771c64f5229843bfe2a20fe0ee6ac59fc1 (patch) | |
| tree | a091be1024bd76627f78e791e377126e47703b7b /include/uapi/linux/virtio_ring.h | |
| parent | ed8f8ce38d0f7b505d7da2d79522972e962457c2 (diff) | |
| parent | 4e1c0664de11e4b5861957ab4ddff2aeeffd042f (diff) | |
Merge branch 'devel-stable' into for-next
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 61c818a7fe7..a3318f31e8e 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. * |