Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754631Ab2KMBxj (ORCPT ); Mon, 12 Nov 2012 20:53:39 -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 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 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1145 Lines: 38 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) -- 1.7.1 -- 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/