From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754570Ab3J0Pxp (ORCPT ); Sun, 27 Oct 2013 11:53:45 -0400 Received: from mout.gmx.net ([212.227.15.19]:57567 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754364Ab3J0Pxo (ORCPT ); Sun, 27 Oct 2013 11:53:44 -0400 Date: Sun, 27 Oct 2013 16:53:40 +0100 From: Helge Deller To: Linus Torvalds , linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, James Bottomley , John David Anglin Subject: [GIT PULL] parisc fix for v3.12 Message-ID: <20131027155340.GA30470@p100.box> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-Provags-ID: V03:K0:BY1CEOYns33tQZnY0hYVHrlYac+y2r8cnKK9V1PiGol/aFypXOU sZQ6ty3NjOwVYLxT5EB78+O2/ADgJiY9JT/G6gF46gMFRmccaCeMcWr4P4yBBqIhIBFhfXn p6H/ALom9uRTo6zAXXwGWxvfsugoefkyuyPvQG01yuYYVOvuiw2JaC9v2ulw5Z1apuRrqgi 40XVjrXZ0X77Eme32eveQ== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Linus, Please pull the one important fix for the parisc architecture from git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git parisc-3.12 This is a 2-line patch to save the CPU register which holds our task thread info pointer before calling a firmware function and then to restore it again afterwards. This is necessary because on some 64bit machines the high-order 32bits are being clobbered by the firmware call, and thus we failed to bring up secondary CPUs (and instead crashed the kernel) in some situations e.g. if we had more than 4GB RAM. This patch fixes a bug which has been since ever in the parisc linux kernel and which prevented some people to use a 64bit kernel. Thanks, Helge ---------------------------------------------------------------- Helge Deller (1): parisc: Do not crash 64bit SMP kernels on machines with >= 4GB RAM arch/parisc/kernel/head.S | 4 ++++ 1 file changed, 4 insertions(+)