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Re: [Qemu-ppc] [Qemu-trivial] [PATCH-for-4.1? 4/7] hw/ipmi: Rewrite a fa


From: Laurent Vivier
Subject: Re: [Qemu-ppc] [Qemu-trivial] [PATCH-for-4.1? 4/7] hw/ipmi: Rewrite a fall through comment
Date: Wed, 21 Aug 2019 10:56:30 +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:
> 
>   hw/ipmi/ipmi_bmc_extern.c: In function ‘addchar’:
>   hw/ipmi/ipmi_bmc_extern.c:178:12: error: this statement may fall through 
> [-Werror=implicit-fallthrough=]
>     178 |         ch |= 0x10;
>         |         ~~~^~~~~~~
>   hw/ipmi/ipmi_bmc_extern.c:181:5: note: here
>     181 |     default:
>         |     ^~~~~~~
>   cc1: all warnings being treated as errors
>   make: *** [rules.mak:69: hw/ipmi/ipmi_bmc_extern.o] Error 1
> 
> 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>
> ---
>  hw/ipmi/ipmi_bmc_extern.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/hw/ipmi/ipmi_bmc_extern.c b/hw/ipmi/ipmi_bmc_extern.c
> index c0a8dac346..d4cbd210c4 100644
> --- a/hw/ipmi/ipmi_bmc_extern.c
> +++ b/hw/ipmi/ipmi_bmc_extern.c
> @@ -176,8 +176,7 @@ static void addchar(IPMIBmcExtern *ibe, unsigned char ch)
>          ibe->outbuf[ibe->outlen] = VM_ESCAPE_CHAR;
>          ibe->outlen++;
>          ch |= 0x10;
> -        /* No break */
> -
> +        /* fall through */
>      default:
>          ibe->outbuf[ibe->outlen] = ch;
>          ibe->outlen++;
> 

Applied to my trivial-patches branch.

Thanks,
Laurent



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