From patchwork Tue Nov 13 01:53:26 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: solomon X-Patchwork-Id: 198520 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 68BE52C009A for ; Tue, 13 Nov 2012 12:54:00 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754566Ab2KMBxi (ORCPT ); Mon, 12 Nov 2012 20:53:38 -0500 Received: from mail-pb0-f46.google.com ([209.85.160.46]:65023 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752751Ab2KMBxg (ORCPT ); Mon, 12 Nov 2012 20:53:36 -0500 Received: by mail-pb0-f46.google.com with SMTP id rr4so4779070pbb.19 for ; Mon, 12 Nov 2012 17:53:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject :content-type:content-transfer-encoding; bh=1Br1LJMxgMqYb+xFr1f35hPV5NNcu3V5YWu8MlU/eyY=; b=zQBInyYVIFcUoes2ydN7vJ6C15hvJ2df0CMppsGvqg9f0pH9d4kpgebRl6fobLo29o du1ejfkTp4bniAwjHNcaVgeJj1DZo3ycwdqKBV9dOC6x5zOgCcBArIRvjFDTw++CFy52 5gbdxmvujv/GOtSZzM8r6xnSZ/QA0fyX111dfPcDVB97n9a9pH3RAAJ4v/Zs540pJzaQ 1RIParhJyMLttsL5tGJA++ij3h/P4P8/0AcRuS/e5GDjaeboC60yZoKr+iyUnz5Wvr+w oRXrSUFHR4VHVo9h4yuC+u20QUJfU8z0CRxv5ubYeI0J+fwErD/iTkXLSfrIXqhogg3s A25w== Received: by 10.66.85.66 with SMTP id f2mr60000567paz.56.1352771616548; Mon, 12 Nov 2012 17:53:36 -0800 (PST) Received: from [172.30.10.127] ([121.14.96.125]) by mx.google.com with ESMTPS id mz10sm5072847pbc.37.2012.11.12.17.53.29 (version=SSLv3 cipher=OTHER); Mon, 12 Nov 2012 17:53:35 -0800 (PST) Message-ID: <50A1A816.3070900@gmail.com> Date: Tue, 13 Nov 2012 09:53:26 +0800 From: Shan Wei User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:16.0) Gecko/20121026 Thunderbird/16.0.2 MIME-Version: 1.0 To: lindner_marek@yahoo.de, siwu@hrz.tu-chemnitz.de, ordex@autistici.org, b.a.t.m.a.n@lists.open-mesh.org, David Miller , NetDev , Kernel-Maillist , Shan Wei , Christoph Lameter Subject: [PATCH v4 9/9] net: batman-adv: use per_cpu_add helper Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Shan Wei this_cpu_add is an atomic operation. and be more faster than per_cpu_ptr operation. Signed-off-by: Shan Wei Reviewed-by: Christoph Lameter --- v4: no changes vs v3. --- net/batman-adv/main.h | 4 +--- 1 files changed, 1 insertions(+), 3 deletions(-) diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h index 897ba6a..3aef5b2 100644 --- a/net/batman-adv/main.h +++ b/net/batman-adv/main.h @@ -263,9 +263,7 @@ static inline bool batadv_has_timed_out(unsigned long timestamp, static inline void batadv_add_counter(struct batadv_priv *bat_priv, size_t idx, size_t count) { - int cpu = get_cpu(); - per_cpu_ptr(bat_priv->bat_counters, cpu)[idx] += count; - put_cpu(); + this_cpu_add(bat_priv->bat_counters[idx], count); } #define batadv_inc_counter(b, i) batadv_add_counter(b, i, 1)