[PATCH] ppc64: Implement a vDSO and use it for signal trampoline

[Benjamin Herrenschmidt]

> Also notice that ':=' uses all over. No need to use late evaluation when
> no dynamic references are used ($ $@ etc.).

Hrm... Rusty tells me that you got it backward ;) Anyway, I'll stick
to := for now, it's not really an issue.

Ben.