systemtap broken by removal of register_timer_hook

[Frank Ch. Eigler]

Frederic Weisbecker <fweisbec@gmail.com> writes:

> [...]
> Sometimes I don't mind keeping around code in the kernel for out of
> tree users, depending on the case. But in this specific matter we have
> more standard ways to do this kind of hook: kprobes, static
> tracepoints. A tracepoint on the timer tick would be useful BTW, and
> you could reuse it.

Thanks for noticing!  IMO kprobes would be too heavyweight for this.
A new static tracepoint would be fine, especially if it passes the
same pt_regs* pointer as the former hook did.

- FChE