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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>,
    linux-s390 <linux-s390@vger.kernel.org>, Jiri Kosina <jkosina@suse.cz>,
    Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
    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