Here is the thread that likely sparked his resignation (if this is a resignation), and more specifically Linus’ response to Hellwig’s earlier comments regarding rust and the Linux kernel.
I agree – I'll need to look this up myself, but I'd love to know what his self-reflection on his annoyance involved: I admit that I still need to do the same to learn restraint during disagreements with new collaborators, that I haven't had the experience to feel trust with yet. My anger's stopped me from productively working in informal standardization efforts within my org.
The only person to get to have it both ways it seems is Linus. In the past he's railed against c++ and it would be cold day in hell to see c++ code in linux.
To be fair, it's his tree. On the other hand, I am a little worried that Linus has been hypocritical in the past few years, but most of us get soft as we age I guess.
https://lore.kernel.org/rust-for-linux/CAHk-=wgLbz1Bm8QhmJ4d...
(Edit to include the correct name)