I wrote:
> Andres Freund <andres@anarazel.de> writes:
>> Should we backpatch this? It's not like we're going to break existing
>> risc-v systems by enabling spinlock support...
> Yeah, why not? If you were building with --disable-spinlocks before,
> this shouldn't change anything for you.
> (I haven't actually looked at the patch, mind you, but in principle
> it shouldn't break anything that worked before.)
I now have looked at the patch, and it seems good as far as it goes,
but I wonder whether some effort ought to be expended in
src/include/port/atomics/.
regards, tom lane