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authorRusty Russell <rusty@rustcorp.com.au>2008-12-30 09:25:57 -0600
committerRusty Russell <rusty@rustcorp.com.au>2008-12-30 09:25:57 +1030
commit5f0d1d7f2286c8a02dab69f5f0bd51681fab161e (patch)
tree8989451d6a60ee9f1bae144fba042b91ce6b21a1 /include/linux/virtio_ring.h
parent480daab42c4dd74b3c07031ddf9031251c530c77 (diff)
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virtio: rename 'pagesize' arg to vring_init/vring_size
It's really the alignment desired for consumer/producer separation; historically this x86 pagesize, but with PowerPC it'll still be x86 pagesize. And in theory lguest could choose a different value. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/virtio_ring.h')
-rw-r--r--include/linux/virtio_ring.h12
1 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
index c4a598fb3826..01bf3124e312 100644
--- a/include/linux/virtio_ring.h
+++ b/include/linux/virtio_ring.h
@@ -83,7 +83,7 @@ struct vring {
* __u16 avail_idx;
* __u16 available[num];
*
- * // Padding to the next page boundary.
+ * // Padding to the next align boundary.
* char pad[];
*
* // A ring of used descriptor heads with free-running index.
@@ -93,19 +93,19 @@ struct vring {
* };
*/
static inline void vring_init(struct vring *vr, unsigned int num, void *p,
- unsigned long pagesize)
+ unsigned long align)
{
vr->num = num;
vr->desc = p;
vr->avail = p + num*sizeof(struct vring_desc);
- vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + pagesize-1)
- & ~(pagesize - 1));
+ vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + align-1)
+ & ~(align - 1));
}
-static inline unsigned vring_size(unsigned int num, unsigned long pagesize)
+static inline unsigned vring_size(unsigned int num, unsigned long align)
{
return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (2 + num)
- + pagesize - 1) & ~(pagesize - 1))
+ + align - 1) & ~(align - 1))
+ sizeof(__u16) * 2 + sizeof(struct vring_used_elem) * num;
}