Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752681AbcKARUy (ORCPT ); Tue, 1 Nov 2016 13:20:54 -0400 Received: from pandora.armlinux.org.uk ([78.32.30.218]:49456 "EHLO pandora.armlinux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750889AbcKARUx (ORCPT ); Tue, 1 Nov 2016 13:20:53 -0400 Date: Tue, 1 Nov 2016 17:18:33 +0000 From: Russell King - ARM Linux To: Christopher Covington Cc: criu@openvz.org, Will Deacon , linux-mm@kvack.org, Laurent Dufour , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [RFC v2 2/7] arm: Use generic VDSO unmap and remap Message-ID: <20161101171833.GS1041@n2100.armlinux.org.uk> References: <20161101171101.24704-1-cov@codeaurora.org> <20161101171101.24704-2-cov@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20161101171101.24704-2-cov@codeaurora.org> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1572 Lines: 38 You know, on its own, this patch is totally meaningless. Sorry, there's nothing more I can say about this. On Tue, Nov 01, 2016 at 11:10:56AM -0600, Christopher Covington wrote: > Checkpoint/Restore In Userspace (CRIU) needs to be able to unmap and remap > the VDSO to successfully checkpoint and restore applications in the face of > changing VDSO addresses due to Address Space Layout Randomization (ASLR, > randmaps). Previously, this was implemented in architecture-specific code > for PowerPC and x86. However, a generic version based on Laurent Dufour's > PowerPC implementation is now available, so begin using it on ARM. > > Signed-off-by: Christopher Covington > --- > arch/arm/mm/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig > index c1799dd..1d3312b 100644 > --- a/arch/arm/mm/Kconfig > +++ b/arch/arm/mm/Kconfig > @@ -845,6 +845,7 @@ config VDSO > depends on AEABI && MMU && CPU_V7 > default y if ARM_ARCH_TIMER > select GENERIC_TIME_VSYSCALL > + select GENERIC_VDSO > help > Place in the process address space an ELF shared object > providing fast implementations of gettimeofday and > -- > Qualcomm Datacenter Technologies as an affiliate of Qualcomm Technologies, Inc. > Qualcomm Technologies, Inc. is a member of the > Code Aurora Forum, a Linux Foundation Collaborative Project. > -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.