Luis Chamberlain sent out the modules changes today for the Linux 6.6 merge window. Most notable with the modules update is a change that better builds up the defenses against NVIDIA’s proprietary kernel driver from using GPL-only symbols. Or in other words, bits that only true open-source drivers should be utilizing and not proprietary kernel drivers like NVIDIA’s default Linux driver in respecting the original kernel code author’s intent.
Back in 2020 when the original defense was added, NVIDIA recommended avoiding the Linux 5.9 for the time being. They ended up having a supported driver several weeks later. It will be interesting to see this time how long Linux 6.6+ thwarts their kernel driver.
I don’t believe in copyright law, but I especially don’t believe in partially enforced copyright law. Nvidia doesn’t get to use copyright to protect their proprietary code while infringing on the copyright of FOSS.
NVIDIA is far from the only ones doing this. There are a ton of startups sweating over this because they figured it was safe to link against this stuff as long as you don’t actually redistribute the libs.