Thanks to Isaak I. Aleksandrov, there is now an additional patch for NVIDIA driver 440.59 to accommodate the Y2038 changes in Kernel 5.6-rc3.   This should be applied after the original 5.6-rc1 patch ( https://gitlab.com/snippets/1937313 ), and can be found here:  https://gitlab.com/snippets/1944237

I have tested this, and it compiles OK with GCC9 (current distros) but fails with GCC10 (pre-beta Fedora 32):

............
/home/rgadsdon/NVIDIA-Linux-x86_64-440.59-custom/kernel/nvidia/linux_nvswitch.c: In function ‘nvswitch_os_get_platform_time’:
/home/rgadsdon/NVIDIA-Linux-x86_64-440.59-custom/kernel/nvidia/linux_nvswitch.c:1583:21: error: storage size of ‘ts’ isn’t known
1583 | struct timespec ts;
| ^~
/home/rgadsdon/NVIDIA-Linux-x86_64-440.59-custom/kernel/nvidia/linux_nvswitch.c:1585:5: error: implicit declaration of function ‘getnstimeofday’; did you mean ‘nv_gettimeofday’? [-Werror=implicit-function-declaration]
1585 | getnstimeofday(&ts);
| ^~~~~~~~~~~~~~
| nv_gettimeofday
/home/rgadsdon/NVIDIA-Linux-x86_64-440.59-custom/kernel/nvidia/linux_nvswitch.c:1586:21: error: implicit declaration of function ‘timespec_to_ns’; did you mean ‘timespec64_to_ns’? [-Werror=implicit-function-declaration]
1586 | return ((NvU64) timespec_to_ns(&ts));
| ^~~~~~~~~~~~~~
| timespec64_to_ns
/home/rgadsdon/NVIDIA-Linux-x86_64-440.59-custom/kernel/nvidia/linux_nvswitch.c:1583:21: warning: unused variable ‘ts’ [-Wunused-variable]
1583 | struct timespec ts;
| ^~
/home/rgadsdon/NVIDIA-Linux-x86_64-440.59-custom/kernel/nvidia/linux_nvswitch.c:1587:1: warning: control reaches end of non-void function [-Wreturn-type]
1587 | }
| ^
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:268: /home/rgadsdon/NVIDIA-Linux-x86_64-440.59-custom/kernel/nvidia/linux_nvswitch.o] Error 1
make[1]: *** [Makefile:1681: /home/rgadsdon/NVIDIA-Linux-x86_64-440.59-custom/kernel] Error 2
make[1]: Leaving directory '/usr/src/linux-5.6-rc3'
make: *** [Makefile:81: modules] Error 2

Robert Gadsdon.   February 24th 2020.