Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760819Ab1EANfz (ORCPT ); Sun, 1 May 2011 09:35:55 -0400 Received: from e6.ny.us.ibm.com ([32.97.182.146]:38360 "EHLO e6.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756145Ab1EANW3 (ORCPT ); Sun, 1 May 2011 09:22:29 -0400 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, eric.dumazet@gmail.com, darren@dvhart.com, patches@linaro.org, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 21/86] rcu: add DEBUG_OBJECTS_RCU_HEAD check for alignment Date: Sun, 1 May 2011 06:21:01 -0700 Message-Id: <1304256126-26015-21-git-send-email-paulmck@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.3.2 In-Reply-To: <20110501132142.GA25494@linux.vnet.ibm.com> References: <20110501132142.GA25494@linux.vnet.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1013 Lines: 28 Verify that rcu_head structures are aligned to a four-byte boundary. This check is enabled by CONFIG_DEBUG_OBJECTS_RCU_HEAD. Signed-off-by: Paul E. McKenney --- include/linux/rcupdate.h | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 9e169c2..c7aeacf 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -785,6 +785,7 @@ extern struct debug_obj_descr rcuhead_debug_descr; static inline void debug_rcu_head_queue(struct rcu_head *head) { + WARN_ON_ONCE((unsigned long)head & 0x3); debug_object_activate(head, &rcuhead_debug_descr); debug_object_active_state(head, &rcuhead_debug_descr, STATE_RCU_HEAD_READY, -- 1.7.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/