clients.
These are helful when making certain drivers work on both Linux
and FreeBSD without changing the code flow too much.
Reviewed by: kib, wlosh
MFC after: 1 month
non-device code.
* Re-implement the method dispatch to improve efficiency. The new system
takes about 40ns for a method dispatch on a 300Mhz PII which is only
10ns slower than a direct function call on the same hardware.
This changes the new-bus ABI slightly so make sure you re-compile any
driver modules which you use.