From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751380AbdFEJFx (ORCPT ); Mon, 5 Jun 2017 05:05:53 -0400 Received: from terminus.zytor.com ([65.50.211.136]:47257 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751272AbdFEJFv (ORCPT ); Mon, 5 Jun 2017 05:05:51 -0400 Date: Mon, 5 Jun 2017 02:01:08 -0700 From: tip-bot for Ben Hutchings Message-ID: Cc: ben@decadent.org.uk, hpa@zytor.com, tglx@linutronix.de, peterz@infradead.org, linux-kernel@vger.kernel.org, sasha.levin@oracle.com, torvalds@linux-foundation.org, mingo@kernel.org Reply-To: torvalds@linux-foundation.org, mingo@kernel.org, sasha.levin@oracle.com, linux-kernel@vger.kernel.org, ben@decadent.org.uk, hpa@zytor.com, tglx@linutronix.de, peterz@infradead.org In-Reply-To: <20170525130005.5947-2-alexander.levin@verizon.com> References: <20170525130005.5947-2-alexander.levin@verizon.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:locking/core] tools/lib/lockdep: Fix undefined symbol prandom_u32 Git-Commit-ID: 3752466b6bf04868296ac6bc27ea1765008636d8 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 3752466b6bf04868296ac6bc27ea1765008636d8 Gitweb: http://git.kernel.org/tip/3752466b6bf04868296ac6bc27ea1765008636d8 Author: Ben Hutchings AuthorDate: Thu, 25 May 2017 12:58:31 +0000 Committer: Ingo Molnar CommitDate: Mon, 5 Jun 2017 09:28:02 +0200 tools/lib/lockdep: Fix undefined symbol prandom_u32 __lock_pin_lock() now calls prandom_u32() which is not defined in liblockdep. __lock_pin_lock() and its caller lock_pin_lock() are dead code in liblockdep, but we still need to provide a definition of prandom_u32() in case lazy binding is disabled. Signed-off-by: Ben Hutchings Signed-off-by: Sasha Levin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: a.p.zijlstra@chello.nl Fixes: e7904a28f533 ("locking/lockdep, sched/core: Implement a better ...") Link: http://lkml.kernel.org/r/20170525130005.5947-2-alexander.levin@verizon.com Signed-off-by: Ingo Molnar --- tools/lib/lockdep/lockdep.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/lib/lockdep/lockdep.c b/tools/lib/lockdep/lockdep.c index a0a2e3a..443acb1 100644 --- a/tools/lib/lockdep/lockdep.c +++ b/tools/lib/lockdep/lockdep.c @@ -1,8 +1,15 @@ #include +#include /* Trivial API wrappers, we don't (yet) have RCU in user-space: */ #define hlist_for_each_entry_rcu hlist_for_each_entry #define hlist_add_head_rcu hlist_add_head #define hlist_del_rcu hlist_del +u32 prandom_u32(void) +{ + /* Used only by lock_pin_lock() which is dead code */ + abort(); +} + #include "../../../kernel/locking/lockdep.c"