netdev - [PATCH 01/15] batman-adv: use per_cpu

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Message-Id: <1358120480-25960-2-git-send-email-ordex@autistici.org>
Date:	Mon, 14 Jan 2013 09:41:06 +1000
From:	Antonio Quartulli <ordex@...istici.org>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
	Shan Wei <davidshan@...cent.com>,
	Sven Eckelmann <sven@...fation.org>,
	Marek Lindner <lindner_marek@...oo.de>,
	Antonio Quartulli <ordex@...istici.org>
Subject: [PATCH 01/15] batman-adv: use per_cpu_add helper

From: Shan Wei <davidshan@...cent.com>

this_cpu_add is an atomic operation.
and be more faster than per_cpu_ptr operation.

Signed-off-by: Shan Wei <davidshan@...cent.com>
Reviewed-by: Christoph Lameter <cl@...ux.com>
Signed-off-by: Sven Eckelmann <sven@...fation.org>
Signed-off-by: Marek Lindner <lindner_marek@...oo.de>
Signed-off-by: Antonio Quartulli <ordex@...istici.org>
---
 net/batman-adv/main.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 2f85577..c4fe41f 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -276,9 +276,7 @@ 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)
-- 
1.8.0.2

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