linux-kernel - Re: [PATCH 3/6] tracing: Wrap section comparison in tracer_alloc_buffers with COMPARE

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Message-ID: <20200219140927.396ca577@gandalf.local.home>
Date:   Wed, 19 Feb 2020 14:09:27 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Jason Gunthorpe <jgg@...pe.ca>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Arnd Bergmann <arnd@...db.de>, Ingo Molnar <mingo@...hat.com>,
        Jason Baron <jbaron@...mai.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH 3/6] tracing: Wrap section comparison in
 tracer_alloc_buffers with COMPARE_SECTIONS

On Wed, 19 Feb 2020 14:16:19 -0400
Jason Gunthorpe <jgg@...pe.ca> wrote:

> > kernel/trace/trace.h
> > 1923:extern const char *__stop___trace_bprintk_fmt[];  
> 
> Godbolt says clang is happy if it is written as:
> 
>   if (&__stop___trace_bprintk_fmt[0] != &__start___trace_bprintk_fmt[0])
> 
> Which is probably the best compromise. The type here is const char
> *[], so it would be a shame to see it go.

If the above works, I'd be happy with that. As it is still readable.

-- Steve