From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752851AbdLBQH2 (ORCPT ); Sat, 2 Dec 2017 11:07:28 -0500 Received: from fldsmtpe03.verizon.com ([140.108.26.142]:1751 "EHLO fldsmtpe03.verizon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752749AbdLBPxe (ORCPT ); Sat, 2 Dec 2017 10:53:34 -0500 From: alexander.levin@verizon.com Cc: Dave Hansen , Andy Lutomirski , Borislav Petkov , Brian Gerst , Denys Vlasenko , "H . Peter Anvin" , Josh Poimboeuf , Linus Torvalds , Peter Zijlstra , "Ingo Molnar" , alexander.levin@verizon.com X-Host: surveyor.tdc.vzwcorp.com To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: [PATCH AUTOSEL for 4.9 04/33] x86/mpx/selftests: Fix up weird arrays Thread-Topic: [PATCH AUTOSEL for 4.9 04/33] x86/mpx/selftests: Fix up weird arrays Thread-Index: AQHTa4WFVv1YkOXcAEqB7K5RXs//Tw== Date: Sat, 2 Dec 2017 15:52:14 +0000 Message-ID: <20171202155204.7691-4-alexander.levin@verizon.com> References: <20171202155204.7691-1-alexander.levin@verizon.com> In-Reply-To: <20171202155204.7691-1-alexander.levin@verizon.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.144.60.250] Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by nfs id vB2G7ZUr023816 From: Dave Hansen [ Upstream commit a6400120d042397675fcf694060779d21e9e762d ] The MPX hardware data structurse are defined in a weird way: they define their size in bytes and then union that with the type with which we want to access them. Yes, this is weird, but it does work. But, new GCC's complain that we are accessing the array out of bounds. Just make it a zero-sized array so gcc will stop complaining. There was not really a bug here. Signed-off-by: Dave Hansen Acked-by: Thomas Gleixner Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20171111001229.58A7933D@viggo.jf.intel.com Signed-off-by: Ingo Molnar Signed-off-by: Sasha Levin --- tools/testing/selftests/x86/mpx-hw.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/x86/mpx-hw.h b/tools/testing/selftests/x86/mpx-hw.h index 093c190178a9..28b3c7c553a4 100644 --- a/tools/testing/selftests/x86/mpx-hw.h +++ b/tools/testing/selftests/x86/mpx-hw.h @@ -51,14 +51,14 @@ struct mpx_bd_entry { union { char x[MPX_BOUNDS_DIR_ENTRY_SIZE_BYTES]; - void *contents[1]; + void *contents[0]; }; } __attribute__((packed)); struct mpx_bt_entry { union { char x[MPX_BOUNDS_TABLE_ENTRY_SIZE_BYTES]; - unsigned long contents[1]; + unsigned long contents[0]; }; } __attribute__((packed)); -- 2.11.0