Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754592AbaLDSUv (ORCPT ); Thu, 4 Dec 2014 13:20:51 -0500 Received: from foss-mx-na.foss.arm.com ([217.140.108.86]:44865 "EHLO foss-mx-na.foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753985AbaLDSUu (ORCPT ); Thu, 4 Dec 2014 13:20:50 -0500 Date: Thu, 4 Dec 2014 18:20:49 +0000 From: Will Deacon To: Alexander Graf Cc: "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Catalin Marinas Subject: Re: [PATCH] arm64: Enable CONFIG_COMPAT also for 64k page size Message-ID: <20141204182049.GB7749@arm.com> References: <1417707993-82290-1-git-send-email-agraf@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1417707993-82290-1-git-send-email-agraf@suse.de> 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 On Thu, Dec 04, 2014 at 03:46:33PM +0000, Alexander Graf wrote: > With binutils 2.25 the default alignment for 32bit arm sections changed to > have everything 64k aligned. Armv7 binaries built with this binutils version > run successfully on an arm64 system. > > Since effectively there is now the chance to run armv7 code on arm64 even > with 64k page size, it doesn't make sense to block people from enabling > CONFIG_COMPAT on those configurations. Is there a distro available that is built with a recent enough binutils for this? I'd really like to run our regression tests to check that page-size assumptions don't exist for things like shm. Will > > Signed-off-by: Alexander Graf > --- > arch/arm64/Kconfig | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 9532f8d..3cf4f238 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -409,7 +409,6 @@ source "fs/Kconfig.binfmt" > > config COMPAT > bool "Kernel support for 32-bit EL0" > - depends on !ARM64_64K_PAGES > select COMPAT_BINFMT_ELF > select HAVE_UID16 > select OLD_SIGSUSPEND3 > -- > 1.7.12.4 > > -- 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/