[PATCH 0/2] arm64: gcs: Return -EPERM when changes are prevented by locking

[Bill Roberts]

On 10/6/26 11:31 AM, Mark Brown wrote:
> On Thu, Sep 24, 2026 at 03:49:14PM -0500, Bill Roberts wrote:
>> On 10/6/26 10:15 AM, Mark Brown wrote:
>>> I was intending to do something soon to pull more of this code out into
>>> some shared place since especially for RISC-V and arm64 where they're
>>> using the prctl() rather than arch_prctl() interface so there's less
>>> reason for things to be duplicated.
>> Bear in mind that I do have patches out there, for x86 that enable prctl
>> for them as well. I looked into doing the lock check in the prctl call path
>> before
>> it gets dispatched to the arch specific backend, it does require a common
>> interface
>> into the threads feature bits that each arch would need to, trivially,
>> implement.
> Yeah, it'd be great if that could land and we could hopefully eventually
> end up with a shared interface for userspace.  We'd still need some arch
> hooks no matter what, but the userspace experience would be much more
> pleasant.
OK let me clean the patches up, and ill send em when I can. Does anyone
know how can I test the risc-v path?