Documentation/process/stable-kernel-rules.rst[1] now mentions how to tag commits you do not want to see backported to stable/longterm series without an explicit request.[2]
Ohh, and it now mentions the difference between stable@kernel.org and stable@vger.kernel.org, too.[3]
'" The data shows that “frozen” vendor #Linux kernels, created by branching off a release point and then using a team of engineers to select specific patches to back-port to that branch, are buggier than the upstream “stable” Linux #kernel created by Greg Kroah-Hartman. '"