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| author | Anthony Liguori <aliguori@us.ibm.com> | 2007-12-21 02:17:47 +0200 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-02-04 23:49:59 +1100 |
| commit | 3309daaad724dd08eb598bf9c12b7bb9daddd706 (patch) | |
| tree | 7f0fb0e040d3bd0e5c88b4f025125cec566221ee /include/linux/virtio_ring.h | |
| parent | f957d1f05a1a20bc3b954877c6562a4d53d58bde (diff) | |
| download | lwn-3309daaad724dd08eb598bf9c12b7bb9daddd706.tar.gz lwn-3309daaad724dd08eb598bf9c12b7bb9daddd706.zip | |
virtio: Fix vring_init/vring_size to take unsigned long
Using unsigned int resulted in silent truncation of the upper 32-bit
on x86_64 resulting in an OOPS since the ring was being initialized
wrong.
Please reconsider my previous patch to just use PAGE_ALIGN(). Open
coding this sort of stuff, no matter how simple it seems, is just
asking for this sort of trouble.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/virtio_ring.h')
| -rw-r--r-- | include/linux/virtio_ring.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h index 8cde10e792c4..ea3be89a0e83 100644 --- a/include/linux/virtio_ring.h +++ b/include/linux/virtio_ring.h @@ -89,7 +89,7 @@ struct vring { * }; */ static inline void vring_init(struct vring *vr, unsigned int num, void *p, - unsigned int pagesize) + unsigned long pagesize) { vr->num = num; vr->desc = p; @@ -98,7 +98,7 @@ static inline void vring_init(struct vring *vr, unsigned int num, void *p, & ~(pagesize - 1)); } -static inline unsigned vring_size(unsigned int num, unsigned int pagesize) +static inline unsigned vring_size(unsigned int num, unsigned long pagesize) { return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (2 + num) + pagesize - 1) & ~(pagesize - 1)) |