Re: [Qemu-devel] [PATCH-for-4.1? 7/7] spapr_events: Rewrite a fall through comment

[David Gibson]

On Fri, Jul 19, 2019 at 03:14:25PM +0200, Philippe Mathieu-Daudé wrote:
> GCC9 is confused by this comment when building with CFLAG
> -Wimplicit-fallthrough=2:
> 
>     CC      ppc64-softmmu/hw/ppc/spapr_rtc.o
>   hw/ppc/spapr_events.c: In function ‘rtas_event_log_to_source’:
>   hw/ppc/spapr_events.c:312:12: error: this statement may fall through 
> [-Werror=implicit-fallthrough=]
>     312 |         if (spapr_ovec_test(spapr->ov5_cas, OV5_HP_EVT)) {
>         |            ^
>   hw/ppc/spapr_events.c:317:5: note: here
>     317 |     case RTAS_LOG_TYPE_EPOW:
>         |     ^~~~
>   cc1: all warnings being treated as errors
> 
> Rewrite the comment using 'fall through' which is recognized by
> GCC and static analyzers.
> 
> Reported-by: Stefan Weil <address@hidden>
> Signed-off-by: Philippe Mathieu-Daudé <address@hidden>

Acked-by: David Gibson <address@hidden>

> ---
>  hw/ppc/spapr_events.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c
> index ae0f093f59..0a98894ad6 100644
> --- a/hw/ppc/spapr_events.c
> +++ b/hw/ppc/spapr_events.c
> @@ -313,7 +313,7 @@ rtas_event_log_to_source(SpaprMachineState *spapr, int 
> log_type)
>              g_assert(source->enabled);
>              break;
>          }
> -        /* fall back to epow for legacy hotplug interrupt source */
> +        /* fall through back to epow for legacy hotplug interrupt source */
>      case RTAS_LOG_TYPE_EPOW:
>          source = spapr_event_sources_get_source(spapr->event_sources,
>                                                  EVENT_CLASS_EPOW);

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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