Re: [PATCH 1/1] arm64: Use _rcuidle for smp_cross_call() tracepoints

[Will Deacon]

On Tue, Feb 12, 2019 at 07:09:25PM +0800, Mars Cheng wrote:
> fix similar issue for aarch64 as the commit 7c64cc0531fa
> ("arm: Use _rcuidle for smp_cross_call() tracepoints") fixed
> in aarch32

I'm not convinced about this justification. As far as I can tell, the commit
mentioned above fixed a cross-call from the idle path as a result of
ARCH_NEEDS_CPU_IDLE_COUPLED, but this never appears to be selected on arm64
afaict.

Are you actually seeing a problem on arm64 in practice?

Will