Comment by Jach

I really love Gentoo's mask system. I upgraded to 4.12.12 not too long ago, it is the latest stable: https://packages.gentoo.org/packages/sys-kernel/gentoo-sourc... You have to explicitly decide to use masked versions, at your own peril. (Of course, many Gentoo users love the bleeding edge, and I too have a number of things I manually unmasked... But the kernel? Stable only please.)