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Re: [Qemu-devel] [Qemu-trivial] [PATCH-for-4.1? 6/7] vl: Rewrite a fall


From: Laurent Vivier
Subject: Re: [Qemu-devel] [Qemu-trivial] [PATCH-for-4.1? 6/7] vl: Rewrite a fall through comment
Date: Wed, 21 Aug 2019 10:58:42 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

Le 19/07/2019 à 15:14, Philippe Mathieu-Daudé a écrit :
> GCC9 is confused by this comment when building with CFLAG
> -Wimplicit-fallthrough=2:
> 
>   vl.c: In function ‘qemu_ref_timedate’:
>   vl.c:773:15: error: this statement may fall through 
> [-Werror=implicit-fallthrough=]
>     773 |         value -= rtc_realtime_clock_offset;
>         |         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>   vl.c:775:5: note: here
>     775 |     case QEMU_CLOCK_VIRTUAL:
>         |     ^~~~
>   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>
> ---
>  vl.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/vl.c b/vl.c
> index a5808f9a02..f5cf71e3b4 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -771,7 +771,7 @@ static time_t qemu_ref_timedate(QEMUClockType clock)
>      switch (clock) {
>      case QEMU_CLOCK_REALTIME:
>          value -= rtc_realtime_clock_offset;
> -        /* no break */
> +        /* fall through */
>      case QEMU_CLOCK_VIRTUAL:
>          value += rtc_ref_start_datetime;
>          break;
> 

Applied to my trivial-patches branch.

Thanks,
Laurent



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