Date: Mon, 22 Apr 2013 15:36:16 +0100
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: =?iso-8859-1?Q?Andr=E9?= Hentschel <nerv@dawncrow.de>
Cc: linux-arch@vger.kernel.org, will.deacon@arm.com,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        gregkh@linuxfoundation.org
Subject: Re: [PATCHv2] arm: Preserve TPIDRURW on context switch
Message-ID: <20130422143616.GP14496@n2100.arm.linux.org.uk>
References: <517168BB.3070903@dawncrow.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <517168BB.3070903@dawncrow.de>
User-Agent: Mutt/1.5.19 (2009-01-05)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 955
Lines: 20

On Fri, Apr 19, 2013 at 05:54:35PM +0200, Andr? Hentschel wrote:
> From: =?UTF-8?q?Andr=C3=A9=20Hentschel?= <nerv@dawncrow.de>
> 
> There are more and more applications coming to WinRT, Wine could support them,
> but mostly they expect to have the thread environment block (TEB) in TPIDRURW.
> This register must be preserved per thread instead of being cleared.
> 
> Signed-off-by: Andr? Hentschel <nerv@dawncrow.de>

This actually makes things less efficient all round, because you
now use the value immediately after loading, which means it will cause
pipeline stalls, certainly on older CPUs.

Could you please rework the patch to try avoiding soo many modifications
to the way things have been done here?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/