RFR(xs): 8211387: [Zero] atomic_copy64: Use ldrexd for atomic reads on ARMv7

[Severin Gehwolf]

On Tue, 2018-10-09 at 07:26 +1000, David Holmes wrote:
> > OK. David, how would you like me to update the webrev then?
> 
> Based on other responses your original is probably fine, but as you've 
> already gone to the trouble ...
> 
> > 2a)
> > http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8211387/webrev.02_a/
> 
> this one is fine.

Thanks, David!

Cheers,
Severin