New subject: [B.A.T.M.A.N.] [PATCH v2 9/9] net: batman-adv: use per_cpu_add helper

2 Nov 2012

From: Shan Wei davidshan@tencent.com
As Christoph Lameter said:
...
In addition, following usage of per_cpu_ptr can be replaced by this_cpu_read.
cpu=get_cpu()
....
*per_cpu_ptr(p,cpu)
....
....
put_cpu()
Right.
Signed-off-by: Shan Wei davidshan@tencent.com
---
 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


    