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[v3,9/9] net: batman-adv: use per_cpu_add helper

Message ID 509C68D7.8040603@gmail.com
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

solomon Nov. 9, 2012, 2:22 a.m. UTC 
From: Shan Wei <davidshan@tencent.com>

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

Signed-off-by: Shan Wei <davidshan@tencent.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
---
v3: change commit message.
---
 net/batman-adv/main.h |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)
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Patch

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)