[PATCH 0/3] x86: Add GCC-12 features

[Peter Zijlstra]

Hi,

These few patches make use of recently merged GCC-12 features:

 -mindirect-branch-cs-prefix:
    https://gcc.gnu.org/g:2196a681d7810ad8b227bf983f38ba716620545e
    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102952
    https://bugs.llvm.org/show_bug.cgi?id=52323

 -mharden-sls=all:
    https://gcc.gnu.org/g:53a643f8568067d7700a9f2facc8ba39974973d3
    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102952
    https://bugs.llvm.org/show_bug.cgi?id=52323