From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthieu CASTET Subject: Re: [PATCH] arm: Preserve TPIDRURW on context switch Date: Tue, 12 Feb 2013 16:02:45 +0100 Message-ID: <511A5995.5000607@parrot.com> References: <5112DC7E.4020108@dawncrow.de> <20130206225150.GL17833@n2100.arm.linux.org.uk> <5112E0C3.1080706@dawncrow.de> <20130208154809.GF3495@mudshark.cambridge.arm.com> <511A4B93.1000700@dawncrow.de> <20130212140950.GC4123@mudshark.cambridge.arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from co202.xi-lite.net ([149.6.83.202]:56239 "EHLO co202.xi-lite.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760056Ab3BLPCu (ORCPT ); Tue, 12 Feb 2013 10:02:50 -0500 In-Reply-To: <20130212140950.GC4123@mudshark.cambridge.arm.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Will Deacon Cc: =?ISO-8859-1?Q?Andr=E9_Hentschel?= , "linux-arch@vger.kernel.org" , Greg KH , Russell King - ARM Linux , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Will Deacon a =E9crit : > Hi Andre, >=20 > On Tue, Feb 12, 2013 at 02:02:59PM +0000, Andr=E9 Hentschel wrote: >> Am 08.02.2013 16:48, schrieb Will Deacon: >>> On Wed, Feb 06, 2013 at 11:01:23PM +0000, Andr=E9 Hentschel wrote: >>>> No, i'm not sure how to improve this. How does the process can con= tinue, can you or someone else fix that and add his Signed-off-by? >>> How about something like the (completely untested) diff below? >>> >>> Andre: if this works for you, I'm happy to write a commit message e= tc. >> Thx for your effort, but it doesn't work, at least not with my 3.4.6= suse kernel. >> Be free to have another try, i'll be happy to test it. >=20 > Well, cheers for testing. Can you be more specific about what goes wr= ong > please? What do you see in TPIDRURW? >=20 The tls value is never saved to : thread->tp_value[1]. Also I don't know if you can avoid the extra ldr in the software case. Matthieu