[PATCH v8 3/3] riscv: store percpu offset into thread_info

[Davidlohr Bueso]

On Fri, 03 Jul 2026, Yunhui Cui wrote:

>RISC-V percpu addressing currently derives the base offset from the CPU
>number and __per_cpu_offset[]. Cache the current CPU percpu offset in
>thread_info so percpu accesses can load it directly.

fyi on a sifive p550 I am seeing this_cpu_inc() cost dropping by ~15-20%
an adhoc microbench measuring/grouping various calls.

Thanks,
Davidlohr