From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:37416 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750744AbdH3GDt (ORCPT ); Wed, 30 Aug 2017 02:03:49 -0400 Date: Wed, 30 Aug 2017 08:03:38 +0200 From: Greg Kroah-Hartman To: Leo Yan Cc: stable@vger.kernel.org, Marc Zyngier , John Stultz , Dmitry Shmidt Subject: Re: [RESEND PATCH] arm64: arch_timer: Workaround for Cortex-A73 erratum 858921 Message-ID: <20170830060338.GA3035@kroah.com> References: <1504069569-27809-1-git-send-email-leo.yan@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1504069569-27809-1-git-send-email-leo.yan@linaro.org> Sender: stable-owner@vger.kernel.org List-ID: On Wed, Aug 30, 2017 at 01:06:09PM +0800, Leo Yan wrote: > commit fa8d815fac96e7c9247783d5a1f8fa4685b3c543 upstream. > > Cortex-A73 (all versions) counter read can return a wrong value > when the counter crosses a 32bit boundary. > > The workaround involves performing the read twice, and to return > one or the other depending on whether a transition has taken place. > > Signed-off-by: Marc Zyngier > Signed-off-by: Leo Yan > --- > arch/arm64/Kconfig | 12 ++++++++++++ > arch/arm64/include/asm/arch_timer.h | 11 +++++++++++ > 2 files changed, 23 insertions(+) Why [RESEND] ? And what stable kernel tree(s) do you want this to be applied to? thanks, greg k-h