[PATCH v8 08/20] aarch64: Add GCS support for makecontext

[Wilco Dijkstra]

Hi Adhemerval,

>> +/* Reserved for future use.  */
>> +static __thread void __attribute__ ((unused)) *__gcs = NULL;
>
> There is no need to reserve this, specially because we are not sure
> which strategy we will use (and this adds extra TLS size for libc.so).

The idea behind this is to reserve a pointer that could be used in
the future by a backport. Or does adding thread local data not
change the ABI unless you add it to the TCB?

Cheers,
Wilco