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

[Catalin Marinas]

On Thu, Sep 10, 2026 at 08:00:39PM +0100, Mark Brown wrote:
> When we refuse to change the GCS configuraiton due to locking we
> currently return -EBUSY which is an odd choice.  The only userspace I
> found that relies on this value at present is the kselftest and other
> architectures are using the more obvious -EPERM here let's switch.

IIUC, riscv is returning -EINVAL. Should we get an overall consistent
value? Personally I find -EBUSY quite descriptive but I don't mind
aligning the architectures (before user space starts making use of the
return value).

-- 
Catalin