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Message-ID: <CAHp75Vc53u=Rgawnwn3nGCBn9Vqd24Z7fSkBiC35rzbC=VGKiQ@mail.gmail.com>
Date:   Mon, 12 Jul 2021 14:22:30 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     kernel test robot <lkp@...el.com>
Cc:     "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        kbuild-all@...ts.01.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [gustavoars-linux:for-next/kspp 5/5] kernel/debug/gdbstub.c:1049:4:
 warning: fallthrough annotation in unreachable code

On Mon, Jul 12, 2021 at 2:11 PM kernel test robot <lkp@...el.com> wrote:


> All warnings (new ones prefixed by >>):
>
> >> kernel/debug/gdbstub.c:1049:4: warning: fallthrough annotation in unreachable code [-Wimplicit-fallthrough]
>                            fallthrough;
>                            ^
>    include/linux/compiler_attributes.h:210:41: note: expanded from macro 'fallthrough'
>    # define fallthrough                    __attribute__((__fallthrough__))
>                                            ^
>    1 warning generated.

> 53197fc4954924 Jason Wessel        2010-04-02  1039             case 'Z': /* Break point set */
> 53197fc4954924 Jason Wessel        2010-04-02  1040                     gdb_cmd_break(ks);
> 53197fc4954924 Jason Wessel        2010-04-02  1041                     break;
> dcc7871128e994 Jason Wessel        2010-05-20  1042  #ifdef CONFIG_KGDB_KDB
> dcc7871128e994 Jason Wessel        2010-05-20  1043             case '3': /* Escape into back into kdb */
> dcc7871128e994 Jason Wessel        2010-05-20  1044                     if (remcom_in_buffer[1] == '\0') {
> dcc7871128e994 Jason Wessel        2010-05-20  1045                             gdb_cmd_detachkill(ks);
> dcc7871128e994 Jason Wessel        2010-05-20  1046                             return DBG_PASS_EVENT;
> dcc7871128e994 Jason Wessel        2010-05-20  1047                     }
> dcc7871128e994 Jason Wessel        2010-05-20  1048  #endif
> df561f6688fef7 Gustavo A. R. Silva 2020-08-23 @1049                     fallthrough;

Obviously this should be inside ifdeffery. Easy to fix cases.

-- 
With Best Regards,
Andy Shevchenko

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