linux-kernel - Re: [PATCH] objtool: ignore unreachable trap after call to noreturn functions

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Message-ID: <CAHFW8PTFsmc7ykbrbdOYM6s-y1fpiV=7ee49BXaHjOkCMhBzhQ@mail.gmail.com>
Date:   Fri, 18 Sep 2020 08:35:40 +0300
From:   Ilie Halip <ilie.halip@...il.com>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Rong Chen <rong.a.chen@...el.com>,
        Marco Elver <elver@...gle.com>,
        Philip Li <philip.li@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        kasan-dev <kasan-dev@...glegroups.com>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: Re: [PATCH] objtool: ignore unreachable trap after call to noreturn functions

> The patch looks good to me.  Which versions of Clang do the trap after
> noreturn call?  It would be good to have that in the commit message.

I omitted this because it happens with all versions of clang that are
supported for building the kernel. clang-9 is the oldest version that
could build the mainline x86_64 kernel right now, and it has the same
behavior.

Should I send a v2 with this info?

I.H.