Technically this is not a low-level primitive. NTSYNC isn't added as a, say, system call like futex2[0] was. It's instead added as a character devivce - which y

Technically this is not a low-level primitive. NTSYNC isn't added as a, say, system call like futex2[0] was. It's instead added as a character devivce - which you can build your kernel without, and functions via ioctls. [0]: https://docs.kernel.org/userspace-api/futex2.html https://docs.kernel.org/userspace-api/futex2.html