http://www.osronline.com/article.cfm?id=257
That article was the first I read about Nt vs Zw difference back then. It's quite helpful, and explains it nicely IMO.
And saves precious Alex's time :-)

Regards,
Aleksey

On 08.07.2014 23:58, Alex Ionescu wrote:

Calling Nt in those functions was by design, and is how Windows does it as well. I can explain Nt vs Zw (for the 100th time) as needed, but for now, I'd kindly ask for a revert please.

Second, the new code does not conform to formatting and style guidelines. Please fix the code before comitting.

Best regards,
Alex Ionescu

On Tue, Jul 8, 2014 at 11:42 AM, <jgardou@svn.reactos.org> wrote:

Author: jgardou
Date: Tue Jul 8 18:42:20 2014
New Revision: 63700

URL: http://svn.reactos.org/svn/reactos?rev=63700&view=rev
Log:
[NTOSKRNL]
- Use ZwSetValueKey instead of NtSetValueKey
- Properly probe and copy parameters when NtSetValueKey is called from UMode
CORE-7738 #resolve #comment fixed in r63700