Message-ID: <5473A74F.8000709@suse.cz>
Date: Mon, 24 Nov 2014 22:46:55 +0100
From: Michal Marek <mmarek@suse.cz>
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To: Josh Stone <jistone@redhat.com>, linux-kernel@vger.kernel.org
CC: "Frank Ch. Eigler" <fche@redhat.com>, Jakub Jelinek <jakub@redhat.com>,
        Josh Boyer <jwboyer@fedoraproject.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Markus Trippelsdorf <markus@trippelsdorf.de>,
        =?UTF-8?B?TWljaGVsIETDpG56?= =?UTF-8?B?ZXI=?= 
	<michel@daenzer.net>
Subject: Re: [PATCH RESEND] Kbuild: Add an option to enable GCC VTA
References: <1416595200-22359-1-git-send-email-jistone@redhat.com>
In-Reply-To: <1416595200-22359-1-git-send-email-jistone@redhat.com>
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Sender: linux-kernel-owner@vger.kernel.org

Dne 21.11.2014 v 19:40 Josh Stone napsal(a):
> Due to recent codegen issues, gcc -fvar-tracking-assignments was
> unconditionally disabled in commit 2062afb4f804a ("Fix gcc-4.9.0
> miscompilation of load_balance() in scheduler").  However, this reduces
[...]
> With gcc-4.9.2-1.fc22, I can now build v3.18-rc5 with Fedora's i686 and
> x86_64 configs, and this is completely clean with GCC_COMPARE_DEBUG.

According to gcc's bug#61801, this is really fixed in 4.9.2 (commit
556537c4 in the git mirror). So how about checking for this minimal
version instead of a new Kconfig option?

thanks,
Michal
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