virtio: fix vring_init for 64 bits
This patch fixes a typo in vring_init(). This happens to work today in lguest because the sizeof(struct vring_desc) is 16 and struct vring contains 3 pointers and an unsigned int so on 32-bit sizeof(struct vring_desc) == sizeof(struct vring). However, this is no longer true on 64-bit where the bug is exposed. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -92,8 +92,8 @@ static inline void vring_init(struct vring *vr, unsigned int num, void *p)
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{
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vr->num = num;
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vr->desc = p;
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vr->avail = p + num*sizeof(struct vring);
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vr->used = p + (num+1)*(sizeof(struct vring) + sizeof(__u16));
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vr->avail = p + num*sizeof(struct vring_desc);
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vr->used = p + (num+1)*(sizeof(struct vring_desc) + sizeof(__u16));
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}
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static inline unsigned vring_size(unsigned int num)
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