[v4] powerpc: Export thread_struct.used_vr/used_vsr to user space

[Michael Ellerman]

Simon Guo <wei.guo.simon at gmail.com> writes:

> Michael, Ben,
> On Fri, Jul 08, 2016 at 08:02:42PM +1000, Michael Ellerman wrote:
>> Benjamin Herrenschmidt <benh at kernel.crashing.org> writes:
>> 
>> > On Thu, 2016-07-07 at 23:21 +1000, Benjamin Herrenschmidt wrote:
>> >> 
>> >> I think the right fix is that if a restore_sigcontext() has the MSR
>> >> bits set,
>> >> it should set the corresponding used_* flag.
>> >
>> > Something like this:
>> >
>> > (totally untested)
>> 
>> Simon/Laurent, can you guys test this and let me know if it works for
>> your usecase.
>
> Sorry for the late reply. I tested Ben's patch and the fix works for the CRIU
> case mentioned before.

Thanks.

Can one of you send a properly formatted and signed-off patch.

cheers