linux-kernel - Re: [PATCH v6 02/25] objtool: Add a pass for generating __mcount

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Date:   Thu, 15 Oct 2020 15:10:00 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Will Deacon <will@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        clang-built-linux@...glegroups.com,
        kernel-hardening@...ts.openwall.com, linux-arch@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kbuild@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        x86@...nel.org
Subject: Re: [PATCH v6 02/25] objtool: Add a pass for generating __mcount_loc

On Wed, Oct 14, 2020 at 08:21:15PM +0200, Peter Zijlstra wrote:
> On Wed, Oct 14, 2020 at 06:50:04PM +0200, Ingo Molnar wrote:
> > Meh, adding --mcount as an option to 'objtool check' was a valid hack for a 
> > prototype patchset, but please turn this into a proper subcommand, just 
> > like 'objtool orc' is.
> > 
> > 'objtool check' should ... keep checking. :-)
> 
> No, no subcommands. orc being a subcommand was a mistake.

Yup, it gets real awkward when trying to combine subcommands.

I proposed a more logical design:

  https://lkml.kernel.org/r/20201002141303.hyl72to37wudoi66@treble

-- 
Josh