[PATCH PULL F16 F17] task_work_add: generic process-context callbacks

[Mark Wielaard]

Thanks for pulling this in.

I just tested out kernel-3.4.4-3.fc16.x86_64 against
systemtap-1.8-1.fc16.x86_64 and user space probing works again (at least
a quick check against the java hotspot probes, didn't yet run a full
systemtap testsuite).