These are grouped into a series largely because of their origin,
not so much because there are heavy dependencies among them.
Compared to v2, there's a new patch resulting from review feedback,
and the last patch should be fully usable now. See also the
individual patches.
1: drop acquiring of per-channel lock from send_guest_{global,vcpu}_virq()
2: avoid access tearing for ->virq_to_evtchn[] accesses
3: convert vIRQ lock to an r/w one
4: convert domain event lock to an r/w one
5: don't call Xen consumer callback with per-channel lock held
Jan
