linux-kernel - Re: [PATCH v2] nfs: remove incorrect fallthrough label

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Message-ID: <CAKwvOdm84xCFq_KVQcNws2QveJdOM_uRrH9s023Gv8sp8V79JA@mail.gmail.com>
Date:   Thu, 17 Sep 2020 14:41:41 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Joe Perches <joe@...ches.com>
Cc:     Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna.schumaker@...app.com>,
        "Gustavo A . R . Silva" <gustavo@...eddedor.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Hongxiang Lou <louhongxiang@...wei.com>,
        Miaohe Lin <linmiaohe@...wei.com>, linux-nfs@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH v2] nfs: remove incorrect fallthrough label

On Wed, Sep 16, 2020 at 1:19 PM Joe Perches <joe@...ches.com> wrote:
>
> On Wed, 2020-09-16 at 13:02 -0700, Nick Desaulniers wrote:
> > * (call of function with __attribute__(__noreturn__))
>
> I guess panic counts.  I count 11 of those.
>
> Are there any other uses of functions with __noreturn
> in switch/case label blocks?

If you look at global_noreturns in tools/objtool/check.c:
 145   static const char * const global_noreturns[] = {
 146     "__stack_chk_fail",
 147     "panic",
 148     "do_exit",
 149     "do_task_dead",
 150     "__module_put_and_exit",
 151     "complete_and_exit",
 152     "__reiserfs_panic",
 153     "lbug_with_loc",
 154     "fortify_panic",
 155     "usercopy_abort",
 156     "machine_real_restart",
 157     "rewind_stack_do_exit",
 158     "kunit_try_catch_throw",
 159   };

Whether they occur or not at the position you ask; I haven't checked.
-- 
Thanks,
~Nick Desaulniers