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Date:   Mon, 12 Feb 2018 11:27:25 +0100 (CET)
From:   Thomas Gleixner <tglx@linutronix.de>
To:     Peter Zijlstra <peterz@infradead.org>
cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Kees Cook <keescook@chromium.org>,
        Ulf Magnusson <ulfalizer@gmail.com>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Nicolas Pitre <nicolas.pitre@linaro.org>,
        "Luis R . Rodriguez" <mcgrof@suse.com>,
        Randy Dunlap <rdunlap@infradead.org>,
        Sam Ravnborg <sam@ravnborg.org>,
        Michal Marek <michal.lkml@markovi.net>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        Pavel Machek <pavel@ucw.cz>,
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        Tejun Heo <tj@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        "Van De Ven, Arjan" <arjan.van.de.ven@intel.com>,
        Arnd Bergmann <arnd@arndb.de>,
        David Woodhouse <dwmw@amazon.co.uk>
Subject: Re: [RFC PATCH 4/7] kconfig: support new special property shell=
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On Mon, 12 Feb 2018, Peter Zijlstra wrote:

> On Sun, Feb 11, 2018 at 10:13:44AM -0800, Linus Torvalds wrote:
> 
> > That actually sounds like we could just
> > 
> >  (a) make gcc 4.5 be the minimum required version
> > 
> >  (b) actually error out if we find a bad compiler
> 
> So the unofficial plan was to enforce asm-goto and -fentry support by
> hard failure to build, which would get us at gcc-4.6 and then remove all

Has gcc-4.6 a (planned) retpoline backport? IIRC the cutoff for that was
gcc 4.9

Thanks,

	tglx