Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754744Ab2HPK2R (ORCPT ); Thu, 16 Aug 2012 06:28:17 -0400 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]:44096 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750854Ab2HPK2P (ORCPT ); Thu, 16 Aug 2012 06:28:15 -0400 Date: Thu, 16 Aug 2012 11:28:09 +0100 From: Will Deacon To: Arnd Bergmann Cc: Catalin Marinas , "linux-arch@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH v2 21/31] arm64: 32-bit (compat) applications support Message-ID: <20120816102808.GH31784@mudshark.cambridge.arm.com> References: <1344966752-16102-1-git-send-email-catalin.marinas@arm.com> <1344966752-16102-22-git-send-email-catalin.marinas@arm.com> <201208151434.05145.arnd@arndb.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201208151434.05145.arnd@arndb.de> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 949 Lines: 28 On Wed, Aug 15, 2012 at 03:34:04PM +0100, Arnd Bergmann wrote: > On Tuesday 14 August 2012, Catalin Marinas wrote: > > +asmlinkage int compat_sys_personality(compat_ulong_t personality) > > +{ > > + int ret; > > + > > + if (personality(current->personality) == PER_LINUX32 && > > + personality == PER_LINUX) > > + personality = PER_LINUX32; > > + ret = sys_personality(personality); > > + if (ret == PER_LINUX32) > > + ret = PER_LINUX; > > + return ret; > > +} > > Where did you get this from? > > You should not need compat_sys_personality, just call the native function. Hmm, but in that case an aarch32 application doing a personality(PER_LINUX) syscall will start seeing the wrong uname. Will -- 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/