Re: [PATCH] alpha: add simd_enabled argument to perf_reg_validate()

[Mi, Dapeng]

On 10/21/2026 11:38 PM, Peter Zijlstra wrote:
> On Wed, Oct 21, 2026 at 01:49:35PM +0200, Thomas Weißschuh wrote:
>> Hi Magnus!
>>
>> On Wed, Oct 21, 2026 at 12:23:55PM +0200, Magnus Lindholm wrote:
>>> On Wed, Oct 21, 2026 at 10:18 AM Thomas Weißschuh
>>> <thomas.weissschuh@xxxxxxxxxxxxx> wrote:
>> (...)
>>
>>> Thanks for catching this. I reproduced the build failure on current
>>> mainline and confirmed your fix with GENERIC SMP and DP264 UP builds.
>>> Both also passed perf register validation and sampling tests in QEMU.
>>>
>>> Reviewed-by: Magnus Lindholm <linmag7@xxxxxxxxx>
>>> Tested-by: Magnus Lindholm <linmag7@xxxxxxxxx>
>> Thanks.
>>
>>> If you have a route for this patch upstream, please go ahead and take it,
>>> unless Linus would prefer to pick it up directly.
>> I have no route upstream. I hope for Linus to pick it up.
>> But if that does not happen, maybe you could send a PR.
> I can stick it in tip/perf/urgent if that helps :-) I'm the one merging
> the broken patch in the first place I suppose :/
>
>> How this issue made it past -next would also be interesting to know.
> Yeah this; normally I get robots screaming at me for things like this.

It looks the issue is caused by the merging order. When the patch series
"Support SIMD/eGPRs/SSP registers sampling for perf" gets queued, the alpha
patches which adds alpha specific perf_reg_validate() variant is still not
merged, so the robot didn't find this issue. Thanks.