From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754131AbXFNWK3 (ORCPT ); Thu, 14 Jun 2007 18:10:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752569AbXFNWJH (ORCPT ); Thu, 14 Jun 2007 18:09:07 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:36448 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752400AbXFNWJG (ORCPT ); Thu, 14 Jun 2007 18:09:06 -0400 Message-Id: <20070614220446.614501106@chello.nl> References: <20070614215817.389524447@chello.nl> User-Agent: quilt/0.46-1 Date: Thu, 14 Jun 2007 23:58:21 +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 04/17] lib: percpu_counter_set Content-Disposition: inline; filename=percpu_counter_set.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 method to set a percpu counter to a specified value. Signed-off-by: Peter Zijlstra --- include/linux/percpu_counter.h | 6 ++++++ lib/percpu_counter.c | 13 +++++++++++++ 2 files changed, 19 insertions(+) Index: linux-2.6/include/linux/percpu_counter.h =================================================================== --- linux-2.6.orig/include/linux/percpu_counter.h 2007-05-23 20:37:41.000000000 +0200 +++ linux-2.6/include/linux/percpu_counter.h 2007-05-23 20:37:54.000000000 +0200 @@ -32,6 +32,7 @@ struct percpu_counter { void percpu_counter_init(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); void __percpu_counter_mod64(struct percpu_counter *fbc, s64 amount, s32 batch); s64 percpu_counter_sum(struct percpu_counter *fbc); @@ -81,6 +82,11 @@ static inline void percpu_counter_destro { } +static inline void percpu_counter_set(struct percpu_counter *fbc, s64 amount) +{ + fbc->count = amount; +} + #define __percpu_counter_mod(fbc, amount, batch) \ percpu_counter_mod(fbc, amount) Index: linux-2.6/lib/percpu_counter.c =================================================================== --- linux-2.6.orig/lib/percpu_counter.c 2007-05-23 20:37:34.000000000 +0200 +++ linux-2.6/lib/percpu_counter.c 2007-05-23 20:38:03.000000000 +0200 @@ -14,6 +14,19 @@ static LIST_HEAD(percpu_counters); static DEFINE_MUTEX(percpu_counters_lock); #endif +void percpu_counter_set(struct percpu_counter *fbc, s64 amount) +{ + int cpu; + + spin_lock(&fbc->lock); + for_each_possible_cpu(cpu) { + s32 *pcount = per_cpu_ptr(fbc->counters, cpu); + *pcount = 0; + } + fbc->count = amount; + spin_unlock(&fbc->lock); +} + void __percpu_counter_mod(struct percpu_counter *fbc, s32 amount, s32 batch) { long count; --