tree 19ba9cea5102595e42bcd043aa53eb666ea834fa
parent c2df88cbb43c25db27fbbf94e92318bdad018f3e
author Ben Hutchings <bhutchings@solarflare.com> 1295435005 +0000
committer David S. Miller <davem@davemloft.net> 1295909516 -0800

lib: cpu_rmap: CPU affinity reverse-mapping

When initiating I/O on a multiqueue and multi-IRQ device, we may want
to select a queue for which the response will be handled on the same
or a nearby CPU.  This requires a reverse-map of IRQ affinity.  Add
library functions to support a generic reverse-mapping from CPUs to
objects with affinity and the specific case where the objects are
IRQs.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>