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virtio: use LGUEST_VRING_ALIGN instead of relying on pagesize

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This doesn't really matter, since lguest is i386 only at the moment,
but we could actually choose a different value.  (lguest doesn't have
a guarenteed ABI).

Signed-off-by: Rusty Russell <[email protected]>
This commit is contained in:
Rusty Russell 2008-12-30 09:25:58 -06:00
commit 2966af73e7
3 changed files with 8 additions and 4 deletions
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2
drivers/lguest/lguest_device.c
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@ -250,7 +250,7 @@ static struct virtqueue *lg_find_vq(struct virtio_device *vdev,
/* Figure out how many pages the ring will take, and map that memory */
lvq->pages = lguest_map((unsigned long)lvq->config.pfn << PAGE_SHIFT,
DIV_ROUND_UP(vring_size(lvq->config.num,
PAGE_SIZE),
LGUEST_VRING_ALIGN),
PAGE_SIZE));
if (!lvq->pages) {
err = -ENOMEM;