From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754715AbdERADP (ORCPT ); Wed, 17 May 2017 20:03:15 -0400 Received: from omzsmtpe01.verizonbusiness.com ([199.249.25.210]:16066 "EHLO omzsmtpe01.verizonbusiness.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754612AbdERACl (ORCPT ); Wed, 17 May 2017 20:02:41 -0400 X-IronPort-Anti-Spam-Filtered: false X-IronPort-AV: E=Sophos;i="5.38,356,1491264000"; d="scan'208";a="205123426" From: alexander.levin@verizon.com X-Host: discovery.odc.vzwcorp.com To: "mingo@kernel.org" CC: "ben@decadent.org.uk" , "linux-kernel@vger.kernel.org" Subject: [PATCH 05/15] liblockdep: Fix 'unused value' warnings Thread-Topic: [PATCH 05/15] liblockdep: Fix 'unused value' warnings Thread-Index: AQHSz2nwe0rzBY+Rgk2eoMu1lnaTHQ== Date: Thu, 18 May 2017 00:01:45 +0000 Message-ID: <20170518000231.16163-5-alexander.levin@verizon.com> References: <20170518000231.16163-1-alexander.levin@verizon.com> In-Reply-To: <20170518000231.16163-1-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 mail.home.local id v4I03avT008731 From: Ben Hutchings liblockdep defines various macros that may expand to an expression with no effect, while the in-kernel definition does have an effect. This results in warnings from gcc when -Wunused-value is enabled, and is is enabled by -Wall. Fix this by introducing trivial functions, as function return values are generally allowed to be ignored. Signed-off-by: Ben Hutchings Signed-off-by: Sasha Levin --- tools/lib/lockdep/uinclude/linux/debug_locks.h | 2 +- tools/lib/lockdep/uinclude/linux/kernel.h | 12 +++++++++--- tools/lib/lockdep/uinclude/linux/lockdep.h | 6 +++++- 3 files changed, 15 insertions(+), 5 deletions(-) diff --git a/tools/lib/lockdep/uinclude/linux/debug_locks.h b/tools/lib/lockdep/uinclude/linux/debug_locks.h index f38eb64df794..1d4fbec5c649 100644 --- a/tools/lib/lockdep/uinclude/linux/debug_locks.h +++ b/tools/lib/lockdep/uinclude/linux/debug_locks.h @@ -4,7 +4,7 @@ #include #include -#define DEBUG_LOCKS_WARN_ON(x) (x) +#define DEBUG_LOCKS_WARN_ON(x) WARN_ON(x) extern bool debug_locks; extern bool debug_locks_silent; diff --git a/tools/lib/lockdep/uinclude/linux/kernel.h b/tools/lib/lockdep/uinclude/linux/kernel.h index da87bd9ad2c1..021cff4f4e3d 100644 --- a/tools/lib/lockdep/uinclude/linux/kernel.h +++ b/tools/lib/lockdep/uinclude/linux/kernel.h @@ -22,10 +22,16 @@ _max1 > _max2 ? _max1 : _max2; }) #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) -#define WARN_ON(x) (x) -#define WARN_ON_ONCE(x) (x) + +static inline int lockdep_warn(int condition) +{ + return condition; +} +#define WARN_ON(x) lockdep_warn(x) +#define WARN_ON_ONCE(x) WARN_ON(x) +#define WARN(x, y...) WARN_ON(x) + #define likely(x) (x) -#define WARN(x, y...) (x) #define uninitialized_var(x) x #define __init #define noinline diff --git a/tools/lib/lockdep/uinclude/linux/lockdep.h b/tools/lib/lockdep/uinclude/linux/lockdep.h index d30214221920..d1079034a14d 100644 --- a/tools/lib/lockdep/uinclude/linux/lockdep.h +++ b/tools/lib/lockdep/uinclude/linux/lockdep.h @@ -29,7 +29,11 @@ extern struct task_struct *__curr(void); #define current (__curr()) -#define debug_locks_off() 1 +static inline int debug_locks_off(void) +{ + return 1; +} + #define task_pid_nr(tsk) ((tsk)->pid) #define KSYM_NAME_LEN 128 -- 2.11.0