[PATCH] malloc: Improve malloc initialization

[DJ Delorie]

Wilco Dijkstra <Wilco.Dijkstra@arm.com> writes:
> Move malloc initialization out of hot paths - it is only required after checking
> fastbins in _int_malloc or before tcache initialization. Bench-malloc-thread
> improves by 1.8% for 1 thread and 1.3% for 32 threads on Neoverse V2.

ptmalloc_init sets up the tunables needed to properly manage tcache and
fastbins...