Re: [Qemu-devel] [PATCH-for-4.1? 4/7] hw/ipmi: Rewrite a fall through comment

[Corey Minyard <minyard@acm.org>]

On Fri, Jul 19, 2019 at 03:14:22PM +0200, Philippe Mathieu-Daudé wrote:
> 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 <sw@weilnetz.de>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
>  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++;
> -- 
> 2.20.1
> 

Well, whatever, this is fine.

Acked-by: Corey Minyard <cminyard@mvista.com>