[PATCH] kernel: set CONFIG_RCU_FANOUT=64 for 64bit targets

[Stijn Tintel]

On 30/07/2021 20:56, Stijn Tintel wrote:
> The generic config has CONFIG_RCU_EXPERT=y, which exposes
> CONFIG_RCU_FANOUT. This is set to 32 in the generic config, but the
> default for 64bit kernels is 64. This causes a warning during boot:
>
> [    0.000000] rcu:     CONFIG_RCU_FANOUT set to non-default value of 32.
>
> Set CONFIG_RCU_FANOUT=64 in kernel configs of 64bit targets, unless the
> target config has disabled CONFIG_RCU_EXPERT.

Alternatively we could disable CONFIG_RCU_EXPERT entirely. Not sure why 
it was enabled in the first place. If anyone knows, please do share.

Stijn