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Date:   Mon, 1 Oct 2018 17:03:53 +0200
From:   Torsten Duwe <duwe@lst.de>
To:     Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc:     Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
        Will Deacon <will.deacon@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Julien Thierry <julien.thierry@arm.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Ingo Molnar <mingo@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
        AKASHI Takahiro <takahiro.akashi@linaro.org>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        live-patching@vger.kernel.org
Subject: Re: [PATCH v3 1/4] DYNAMIC_FTRACE configurable with and without
 REGS
Message-ID: <20181001150353.GA2634@lst.de>
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On Mon, Oct 01, 2018 at 04:52:27PM +0200, Ard Biesheuvel wrote:
> 
> I guess we now have Kbuild/Kconfig support for this, no? I mean, we
> can now show/hide options depending on the capabilities of the
> toolchain.

Config options depending on flags availability?

> I am not saying it would be a better approach, though - I'd rather
> have a warning than have things silently disabled, but other people
> may think differently.

Even then this switch has to be enabled, no matter who or what sets it.
Note that this patch leaves everything as-is. Only arm64 users with
"old" compilers would need to take action.

	Torsten