From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752813AbXFNWKE (ORCPT ); Thu, 14 Jun 2007 18:10:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752421AbXFNWJG (ORCPT ); Thu, 14 Jun 2007 18:09:06 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:36442 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752207AbXFNWJF (ORCPT ); Thu, 14 Jun 2007 18:09:05 -0400 Message-Id: <20070614220446.724626895@chello.nl> References: <20070614215817.389524447@chello.nl> User-Agent: quilt/0.46-1 Date: Thu, 14 Jun 2007 23:58:23 +0200 From: Peter Zijlstra To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, a.p.zijlstra@chello.nl, nikita@clusterfs.com, trond.myklebust@fys.uio.no, yingchao.zhou@gmail.com, andrea@suse.de Subject: [PATCH 06/17] lib: percpu_counter_init_irq Content-Disposition: inline; filename=percpu_counter_init_irq.patch X-Bad-Reply: References but no 'Re:' in Subject. Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org provide a way to init percpu_counters that are supposed to be used from irq safe contexts. Signed-off-by: Peter Zijlstra --- include/linux/percpu_counter.h | 4 ++++ lib/percpu_counter.c | 8 ++++++++ 2 files changed, 12 insertions(+) Index: linux-2.6/include/linux/percpu_counter.h =================================================================== --- linux-2.6.orig/include/linux/percpu_counter.h +++ linux-2.6/include/linux/percpu_counter.h @@ -31,6 +31,8 @@ struct percpu_counter { #endif void percpu_counter_init(struct percpu_counter *fbc, s64 amount); +void percpu_counter_init_irq(struct percpu_counter *fbc, s64 amount); + void percpu_counter_destroy(struct percpu_counter *fbc); void percpu_counter_set(struct percpu_counter *fbc, s64 amount); void __percpu_counter_mod(struct percpu_counter *fbc, s32 amount, s32 batch); @@ -89,6 +91,8 @@ static inline void percpu_counter_init(s fbc->count = amount; } +#define percpu_counter_init_irq percpu_counter_init + static inline void percpu_counter_destroy(struct percpu_counter *fbc) { } Index: linux-2.6/lib/percpu_counter.c =================================================================== --- linux-2.6.orig/lib/percpu_counter.c +++ linux-2.6/lib/percpu_counter.c @@ -87,6 +87,8 @@ s64 __percpu_counter_sum(struct percpu_c } EXPORT_SYMBOL(__percpu_counter_sum); +static struct lock_class_key percpu_counter_irqsafe; + void percpu_counter_init(struct percpu_counter *fbc, s64 amount) { spin_lock_init(&fbc->lock); @@ -100,6 +102,12 @@ void percpu_counter_init(struct percpu_c } EXPORT_SYMBOL(percpu_counter_init); +void percpu_counter_init_irq(struct percpu_counter *fbc, s64 amount) +{ + percpu_counter_init(fbc, amount); + lockdep_set_class(&fbc->lock, &percpu_counter_irqsafe); +} + void percpu_counter_destroy(struct percpu_counter *fbc) { free_percpu(fbc->counters); --