[PATCH v4 1/2] arm64: topology: move store_cpu_topology() to shared code

[Conor.Dooley at microchip.com]

On 19/07/2022 12:41, Catalin Marinas wrote:
> On Fri, Jul 15, 2022 at 06:51:55PM +0100, Conor Dooley wrote:
>> From: Conor Dooley <conor.dooley at microchip.com>
>>
>> arm64's method of defining a default cpu topology requires only minimal
>> changes to apply to RISC-V also. The current arm64 implementation exits
>> early in a uniprocessor configuration by reading MPIDR & claiming that
>> uniprocessor can rely on the default values.
>>
>> This is appears to be a hangover from prior to '3102bc0e6ac7 ("arm64:
>> topology: Stop using MPIDR for topology information")', because the
>> current code just assigns default values for multiprocessor systems.
>>
>> With the MPIDR references removed, store_cpu_topolgy() can be moved to
>> the common arch_topology code.
>>
>> CC: stable at vger.kernel.org
> 
> I'd quantify how far back you want this to go. IIUC based on the Fixes
> tag in the other patch, it should stop at 5.4. If you send a pull
> request instead and have a fixed commit id, you could add it as a
> prerequisite on the following patch without a cc stable here.

I guess a PR might be the easiest way for it anyway, so that both
yourself and Palmer could merge it?

> 
> Either way:
> 
> Acked-by: Catalin Marinas <catalin.marinas at arm.com>

Thanks.