From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932579Ab3AYOPN (ORCPT ); Fri, 25 Jan 2013 09:15:13 -0500 Received: from moutng.kundenserver.de ([212.227.126.187]:51165 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932348Ab3AYOPI (ORCPT ); Fri, 25 Jan 2013 09:15:08 -0500 From: Arnd Bergmann To: linux-arm-kernel@list.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 14:14:25 +0000 Message-Id: <1359123276-15833-9-git-send-email-arnd@arndb.de> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1359123276-15833-1-git-send-email-arnd@arndb.de> References: <1359123276-15833-1-git-send-email-arnd@arndb.de> X-Provags-ID: V02:K0:/Hob6oHYoRPdnBCYy7R4yJ+YVMHa9RNZPzmAURAMFqD tC8o1cdK7qfewWQ3pCGEbWYKENA0eU4LJ0aLbcTwRrCjXuVp4I JrfhSuxVvcyqHLdOfhDuuDsznkhk+3/hmMDu/vxeqFe+QfCELu Uk/PO+Y19bP1pUMsbOIeGbGGC0WnORXNpxFAt336ivfqWaqJ69 HtbXaxS04BwI7xlBRPi4UNxqpcvejseCRO4puNun+jehG6OngI 1lygJOIvGJ7gme+rPdF49exKhhX8YuPy8bZrxs+aCeHt8ZGe5W MkCSUeP6iE3LjdrWeid3vYrDdl3zLxwrDclzS6+x/cyVLHlb51 /rbGf9q6S680m7RrwQ1QjBWDHe73NSbUiDew98DtF 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