From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754529Ab3AYWtx (ORCPT ); Fri, 25 Jan 2013 17:49:53 -0500 Received: from moutng.kundenserver.de ([212.227.17.10]:64134 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753019Ab3AYWps (ORCPT ); Fri, 25 Jan 2013 17:45:48 -0500 From: Arnd Bergmann To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Arnd Bergmann , Peter Zijlstra , Ingo Molnar , Stanislav Kinsbursky Subject: [PATCH 08/19] lockdep: avoid warning about unused variables Date: Fri, 25 Jan 2013 22:44:07 +0000 Message-Id: <1359153858-31992-9-git-send-email-arnd@arndb.de> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1359153858-31992-1-git-send-email-arnd@arndb.de> References: <1359123276-15833-1-git-send-email-arnd@arndb.de> <1359153858-31992-1-git-send-email-arnd@arndb.de> X-Provags-ID: V02:K0:F65E/Z7RZJ8+lH8eCZhgd7CbbijzTjSQ9mWJmsfdpAg 61ntjX/pqtf/8J1eS6jf0YlhQ9McZH1TEExWCOqcVzjTKsF81E 1Kg+sn6q+kx7iyUOYfue02qxk/Cv/r71YrR7rk5OnbDQYUt558 KosNOuyyCSnarOnQ+EkULSlSo+wjUZJCWKhnjCkAQ+DxT6Nrwj fnKbbj6AsW9Qxm3EnUr8cfKzVC8SJ5hrsXwg6n7bl3VQBRwOhB S6cDoqAY5qh1ER5sy2ntiri0x6HYzLljXczhmpRkQE2v5bLU7d Jj8Ld/yzDS6RVPwaknbhf1bV/t9a18aJo8+ZEB2hE8F/FGS6d5 q4SzW8/K7NDWAiq5RvitNetBpUfAjIx3d9fWoHYKL Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When lockdep is disabled, a call to lockdep_assert_held does not use its argument, which results in a compiler warning if nothing else in the same function uses that variable. An instance of this was introduced by c9a49628819 "nfsd: make client_lock per net". Without this patch, building ARM cerfcube_defconfig results in: fs/nfsd/nfs4state.c: In function 'free_client': fs/nfsd/nfs4state.c:1047:19: error: unused variable 'nn' [-Wunused-variable] Signed-off-by: Arnd Bergmann Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Stanislav Kinsbursky --- include/linux/lockdep.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 2bca44b..f05631e 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -410,7 +410,7 @@ struct lock_class_key { }; #define lockdep_depth(tsk) (0) -#define lockdep_assert_held(l) do { } while (0) +#define lockdep_assert_held(l) do { (void)(l); } while (0) #define lockdep_recursing(tsk) (0) -- 1.8.0