Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-qa0-f47.google.com ([209.85.216.47]:53168 "EHLO mail-qa0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751208AbaFZTP1 (ORCPT ); Thu, 26 Jun 2014 15:15:27 -0400 Received: by mail-qa0-f47.google.com with SMTP id hw13so3141188qab.20 for ; Thu, 26 Jun 2014 12:15:26 -0700 (PDT) From: Jeff Layton To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org, Peter Zijlstra , Ingo Molnar Subject: [PATCH v2 074/117] lockdep: add lockdep_assert_not_held Date: Thu, 26 Jun 2014 15:12:54 -0400 Message-Id: <1403810017-16062-75-git-send-email-jlayton@primarydata.com> In-Reply-To: <1403810017-16062-1-git-send-email-jlayton@primarydata.com> References: <1403810017-16062-1-git-send-email-jlayton@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: We currently have the ability to call lockdep_assert_held to throw a warning when a spinlock isn't held in a codepath. There are also times when we'd like to throw a warning when a lock is held (i.e. when there is the potential for deadlock with atomic_dec_and_lock or similar). Cc: Peter Zijlstra Cc: Ingo Molnar Signed-off-by: Jeff Layton --- include/linux/lockdep.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 008388f920d7..1e5f1d544029 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -362,6 +362,8 @@ extern void lockdep_trace_alloc(gfp_t mask); WARN_ON(debug_locks && !lockdep_is_held(l)); \ } while (0) +#define lockdep_assert_not_held(l) WARN_ON(debug_locks && lockdep_is_held(l)) + #define lockdep_recursing(tsk) ((tsk)->lockdep_recursion) #else /* !CONFIG_LOCKDEP */ @@ -413,6 +415,8 @@ struct lock_class_key { }; #define lockdep_assert_held(l) do { (void)(l); } while (0) +#define lockdep_assert_not_held(l) (void)(l) + #define lockdep_recursing(tsk) (0) #endif /* !LOCKDEP */ -- 1.9.3