Re: [XEN PATCH v2 09/13] x86/mm: add defensive return

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Mon, 24 Jun 2024, Federico Serafini wrote:
> Add defensive return statement at the end of an unreachable
> default case. Other than improve safety, this meets the requirements
> to deviate a violation of MISRA C Rule 16.3: "An unconditional `break'
> statement shall terminate every switch-clause".
> 
> Signed-off-by: Federico Serafini <federico.serafini@xxxxxxxxxxx>
> ---
>  xen/arch/x86/mm.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
> index 648d6dd475..2e19ced15e 100644
> --- a/xen/arch/x86/mm.c
> +++ b/xen/arch/x86/mm.c
> @@ -916,6 +916,7 @@ get_page_from_l1e(
>                  return 0;
>              default:
>                  ASSERT_UNREACHABLE();
> +                return 0;

Let's avoid this