The #ntsync "driver" to handle Windows locking types enabling #Wine to work much better on many workloads (i.e. games) was merged as part of the main Char/Misc/IIO driver updates for #Linux 6.14:
https://git.kernel.org/torvalds/c/13845bdc869f136f92ad3d40ea09b867bb4ce467
'"The driver framework was in 6.13, but now it's enabled and fully working properly. Should make many #SteamOS users happy."'
In case you wonder what was changed to fix the last remaining problems, see https://lore.kernel.org/all/20241213193511.457338-1-zfigura@codeweavers.com/