linux-kernel - Re: [PATCH 10/11] x86, rwsem: provide __down_write

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Message-ID: <20160421130910.GB18427@dhcp22.suse.cz>
Date:	Thu, 21 Apr 2016 09:09:11 -0400
From:	Michal Hocko <mhocko@...nel.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"David S. Miller" <davem@...emloft.net>,
	Tony Luck <tony.luck@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Chris Zankel <chris@...kel.net>,
	Max Filippov <jcmvbkbc@...il.com>, x86@...nel.org,
	linux-alpha@...r.kernel.org, linux-ia64@...r.kernel.org,
	linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
	sparclinux@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
	linux-arch@...r.kernel.org, Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH 10/11] x86, rwsem: provide __down_write_killable

On Thu 21-04-16 13:35:16, Borislav Petkov wrote:
> On Wed, Apr 20, 2016 at 03:29:30PM -0700, H. Peter Anvin wrote:
> > Since it is a fixed register we could just mark edx clobbered, but
> > with more flexible register constraints it can permit gcc to allocate
> > a temp resister for us. --
> 
> Right.
> 
> I'll try to hack up a cleanup ontop once the dust here settles and Ingo
> pushes out the pile.

Thanks Boris! This is highly appreciated.
-- 
Michal Hocko
SUSE Labs