Rusty Russell wrote: > It turns out the lguest (and possibly kvm) want the addresses in the > ring buffer to only cover a certain part of memory, and be offset. > > It makes sense that this be an ioctl. > > Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx> > <snip> > @@ -208,12 +232,15 @@ int vring_get_buffer(struct vring_info * > out_len = &dummy; > > *in_len = *out_len = 0; > - > - if (unlikely(get_user(head, &vr->ring.avail->ring[head]) != 0)) > + > + if (unlikely(get_user(head, &vr->ring.avail->ring[vr->last_avail > + % vr->ring.num]))) Why not & with vr->mask for the sake of consistency with the rest of the code. Regards, Anthony Liguori _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
