objtool-urgent-2022-06-05

  - Handle __ubsan_handle_builtin_unreachable() correctly and treat it as
    noreturn.

  - Allow architectures to select uaccess validation

  - Use the non-instrumented bit test for test_cpu_has() to prevent escape
    from non-instrumentable regions.

  - Use arch_ prefixed atomics for JUMP_LABEL=n builds to prevent escape
    from non-instrumentable regions.

  - Mark a few tiny inline as __always_inline to prevent GCC from bringing
    them out of line and instrumenting them.

  - Mark the empty stub context_tracking_enabled() as always inline as GCC
    brings them out of line and instruments the empty shell.

  - Annotate ex_handler_msr_mce() as dead end