On Fri, Jul 10, 2020 at 09:14:26PM -0400, Steven Rostedt wrote: > On Fri, 10 Jul 2020 15:38:46 +0200 > Peter Zijlstra <pet...@infradead.org> wrote: > > > In order to use static_call() to wire up x86_pmu, we need to > > initialize earlier; copy some of the tricks from jump_label to enable > > this. > > > > Primarily we overload key->next to store a sites pointer when there > > are no modules, this avoids having to use kmalloc() to initialize the > > sites and allows us to run much earlier. > > > > I'm confused. What was the need to have key->next store site pointers > in order to move it up earlier?
The critical part was to not need an allocation.
