NVIDIA have released driver 418.56, and details are here:  https://devtalk.nvidia.com/default/topic/1048767/announcements-and-news/-linux-solaris-and-freebsd-driver-418-56-long-lived-branch-release-/

This version has almost the same problems with Kernel 5.1-rc1 as 418.43, but the fix mentioned in the previous article still applies, after the fixes for ‘list_is_first‘ in   ~/kernel/common/inc/nv-list-helpers.h and ~/kernel/nvidia-uvm/uvm8_range_tree.c have been removed, as these are no longer required, and would now cause the compile to fail.

.............................
ld -r -o /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia-modeset/nv-modeset-interface.o /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia-modeset/nvidia-modeset-linux.o
Building modules, stage 2.
MODPOST 4 modules
CC /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia-drm.mod.o
LD [M] /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia-drm.ko
CC /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia-modeset.mod.o
LD [M] /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia-modeset.ko
CC /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia-uvm.mod.o
LD [M] /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia-uvm.ko
CC /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia.mod.o
LD [M] /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-418.56-custom/kernel/nvidia.ko
make[2]: Leaving directory '/usr/src/linux-5.1-rc1'
make[1]: Leaving directory '/usr/src/linux-5.1-rc1'

Robert Gadsdon.  March 21, 2019.