Shorten path prefix about std::sync::atomic::Ordering

[ppdogg]

No description provided.

[skyzh]

the reason I didn't do that is we have both atomic::Ordering and cmp::Ordering and it usually messes up things when being imported into the global namespace. I'd rather do use std::sync::atomic::Ordering as AtomicOrdering, or use std::sync::atomic then do atomic::Ordering when using it?

[ppdogg]

I think use std::sync::atomic then do atomic::Ordering is better, different from cmp::Ordering but with shorter path prefix.
Also, I see direct use Ordering in txn.rs, is that because there will be conflicts in other srcs but no conflict in this particular src?

[skyzh]

Also, I see direct use Ordering in txn.rs, is that because there will be conflicts in other srcs but no conflict in this particular src?

I would have avoided that, and I can have a patch to fix it later.