Tested the latest NVIDIA ‘Beta’ driver – 367.18 – and it compiles OK with Kernel 4.6..

 ...............
Building modules, stage 2.
 MODPOST 4 modules
 CC /home/rgadsdon/Desktop/Downloads/NVIDIA-Linux-x86_64-367.18/kernel/nvidia-drm.mod.o
 LD [M] /home/rgadsdon/Desktop/Downloads/NVIDIA-Linux-x86_64-367.18/kernel/nvidia-drm.ko
 CC /home/rgadsdon/Desktop/Downloads/NVIDIA-Linux-x86_64-367.18/kernel/nvidia-modeset.mod.o
 LD [M] /home/rgadsdon/Desktop/Downloads/NVIDIA-Linux-x86_64-367.18/kernel/nvidia-modeset.ko
 CC /home/rgadsdon/Desktop/Downloads/NVIDIA-Linux-x86_64-367.18/kernel/nvidia-uvm.mod.o
 LD [M] /home/rgadsdon/Desktop/Downloads/NVIDIA-Linux-x86_64-367.18/kernel/nvidia-uvm.ko
 CC /home/rgadsdon/Desktop/Downloads/NVIDIA-Linux-x86_64-367.18/kernel/nvidia.mod.o
 LD [M] /home/rgadsdon/Desktop/Downloads/NVIDIA-Linux-x86_64-367.18/kernel/nvidia.ko
........................

Release notes etc. are here: http://www.geforce.com/drivers/results/102879

Robert Gadsdon.   May 19, 2016.