Pull hardening fixes from Kees Cook:
- gcc-plugins/stackleak: Avoid .head.text section (Ard Biesheuvel)
- ubsan: fix unused variable warning in test module (Arnd Bergmann)
- Improve entropy diffusion in randomize_kstack
* tag 'hardening-v6.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
randomize_kstack: Improve entropy diffusion
ubsan: fix unused variable warning in test module
gcc-plugins/stackleak: Avoid .head.text section