> On 23 Dec 2024, at 4:55, Rik van Riel <riel@xxxxxxxxxxx> wrote: > > --- a/arch/x86/kernel/setup.c > +++ b/arch/x86/kernel/setup.c > @@ -138,6 +138,10 @@ __visible unsigned long mmu_cr4_features __ro_after_init; > __visible unsigned long mmu_cr4_features __ro_after_init = X86_CR4_PAE; > #endif > > +#ifdef CONFIG_CPU_SUP_AMD > +u16 invlpgb_count_max; Any reason to mark it also as __ro_after_init?