From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shan Wei Subject: [PATCH v4 9/9] net: batman-adv: use per_cpu_add helper Date: Tue, 13 Nov 2012 09:53:26 +0800 Message-ID: <50A1A816.3070900@gmail.com> Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit To: lindner_marek-LWAfsSFWpa4@public.gmane.org, siwu-MaAgPAbsBIVS8oHt8HbXEIQuADTiUCJX@public.gmane.org, ordex-GaUfNO9RBHfsrOwW+9ziJQ@public.gmane.org, b.a.t.m.a.n-ZwoEplunGu2X36UT3dwllkB+6BGkLq7r@public.gmane.org, David Miller , NetDev , Kernel-Maillist , Shan Wei , Christoph Lameter Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: b.a.t.m.a.n-bounces-ZwoEplunGu2X36UT3dwllkB+6BGkLq7r@public.gmane.org Sender: "B.A.T.M.A.N" List-Id: 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) -- 1.7.1