Re: [PATCH 04/23] KVM: MMU: constify uses of struct kvm_mmu_role_regs

[Sean Christopherson]

On Fri, Feb 04, 2022, Paolo Bonzini wrote:
> struct kvm_mmu_role_regs is computed just once and then accessed.  Use
> const to enforce this.

It's not new enforcement, just syntatic sugar (though it's tasty sugar).  All fields
in struct kvm_mmu_role_regs are const specifically to prevent such a struct from
being changed regardless of how a pointer was obtained.

struct kvm_mmu_role_regs {
	const unsigned long cr0;
	const unsigned long cr4;
	const u64 efer;
};