From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752894Ab0C2Ojk (ORCPT ); Mon, 29 Mar 2010 10:39:40 -0400 Received: from smtp.polymtl.ca ([132.207.4.11]:60656 "EHLO smtp.polymtl.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752780Ab0C2Oji (ORCPT ); Mon, 29 Mar 2010 10:39:38 -0400 Message-Id: <20100329143702.569823647@efficios.com> References: <20100329143405.252313609@efficios.com> User-Agent: quilt/0.46-1 Date: Mon, 29 Mar 2010 10:34:09 -0400 From: Mathieu Desnoyers To: akpm@linux-foundation.org, Ingo Molnar , linux-kernel@vger.kernel.org, paulmck@linux.vnet.ibm.com, laijs@cn.fujitsu.com, dipankar@in.ibm.com, josh@joshtriplett.org, dvhltc@us.ibm.com, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, eric.dumazet@gmail.com, adobriyan@gmail.com, "David S. Miller" Cc: Mathieu Desnoyers Subject: [patch 4/5] rcu head remove init Content-Disposition: inline; filename=rcu-head-remove-init.patch X-Poly-FromMTA: (test.casi.polymtl.ca [132.207.72.60]) at Mon, 29 Mar 2010 14:37:02 +0000 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RCU heads really don't need to be initialized. Their state before call_rcu() really does not matter. We need to keep init/destroy_rcu_head_on_stack() though, since we want debugobjects to be able to keep track of these objects. Signed-off-by: Mathieu Desnoyers CC: David S. Miller CC: "Paul E. McKenney" CC: akpm@linux-foundation.org CC: mingo@elte.hu CC: laijs@cn.fujitsu.com CC: dipankar@in.ibm.com CC: josh@joshtriplett.org CC: dvhltc@us.ibm.com CC: niv@us.ibm.com CC: tglx@linutronix.de CC: peterz@infradead.org CC: rostedt@goodmis.org CC: Valdis.Kletnieks@vt.edu CC: dhowells@redhat.com CC: eric.dumazet@gmail.com CC: Alexey Dobriyan --- include/linux/rcupdate.h | 6 ------ 1 file changed, 6 deletions(-) Index: linux.trees.git/include/linux/rcupdate.h =================================================================== --- linux.trees.git.orig/include/linux/rcupdate.h 2010-03-29 10:11:32.000000000 -0400 +++ linux.trees.git/include/linux/rcupdate.h 2010-03-29 10:11:42.000000000 -0400 @@ -77,12 +77,6 @@ extern void rcu_scheduler_starting(void) #error "Unknown RCU implementation specified to kernel configuration" #endif -#define RCU_HEAD_INIT { .next = NULL, .func = NULL } -#define RCU_HEAD(head) struct rcu_head head = RCU_HEAD_INIT -#define INIT_RCU_HEAD(ptr) do { \ - (ptr)->next = NULL; (ptr)->func = NULL; \ -} while (0) - static inline void init_rcu_head_on_stack(struct rcu_head *head) { } -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68