[PATCH] kernel: disable CONFIG_RCU_EXPERT and friends

[Rui Salvaterra]

Hi, Hauke,

On Sun, 22 Aug 2021 at 10:20, Hauke Mehrtens <hauke at hauke-m.de> wrote:
>
> There are also some targets which explicitly unset CONFIG_RCU_EXPERT:

[snipped]

> This should be removed from the target config file.

Sure thing, I'll clean up the targets and fold the changes into this patch.

> CONFIG_RCU_STALL_COMMON=y and CONFIG_RCU_NEED_SEGCBLIST=y are also set
> in most target configurations. Should we move them to the generic
> configuration?

Good question. Those symbols are only relevant when tree RCU is
enabled, which is everything except non-preemptible, non-SMP kernels.
We don't enable preemption, so basically these will only be relevant
for SMP devices. That said, I believe moving them to the generic
kconfigs is the right thing to do. Do you agree?

Cheers,
Rui