Comment # 1 on bug 1188712 from Jiri Slaby

This was likely fixed by:
commit a88603f4b92ecef9e2359e40bcb99ad399d85dd7
Author: Michael Ellerman <mpe@ellerman.id.au>
Date:   Thu Jul 29 22:56:36 2021 +1000

    powerpc/vdso: Don't use r30 to avoid breaking Go lang

in 5.14-rc4. So I think we can close now?