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net: batman-adv: use per_cpu_add helper

PATCH Superseded Shan Wei 3 participants 6 messages Nov 2, 2012 – Nov 5, 2012

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v2 of 4 Superseded Latest is v4 →

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Shan Wei

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#0 lore raw

PATCH v2 9/9 net: batman-adv: use per_cpu_add helper

From: Shan Wei <[email protected]>

Quoted 8 lines · As Christoph Lameter

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.

---
 net/batman-adv/main.h |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)
net/batman-adv/main.h +1 -3
index 897ba6a..3aef5b2 100644
@@ -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)
Signature · 1 line
1.7.1
Reviewed-by on v2 9/9
#1 lore raw

net/batman-adv/main.h static inline bool batadv_has_timed_out(unsigned long timestamp, · line 267

Quoted 13 lines · Shan Wei
net/batman-adv/main.h +1 -3
index 897ba6a..3aef5b2 100644
@@ -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);
 }
maintainer
#2 lore raw
In reply to Shan Wei
Quoted 13 lines · On Saturday 03 November 2012 00:02:06 Shan Wei wrote:

From: Shan Wei <[email protected]>

Quoted 9 lines · As Christoph Lameter

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()

Quoted 4 lines

Right.

---

Is this really supposed to be the commit message?

Kind regards,
Sven

author
#3 lore raw

Sven Eckelmann said, at 2012/11/3 1:55:

Quoted 14 lines · On Saturday 03 November 2012 00:02:06 Shan Wei wrote:
Quoted 13 lines

From: Shan Wei <[email protected]>

Quoted 9 lines · As Christoph Lameter

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()

Quoted 6 lines
Quoted 4 lines

Right.

---

Is this really supposed to be the commit message?

Maybe it's ok when Linus said this. :-)

Christoph is the maintainer of per-cpu.
So........

PER-CPU MEMORY ALLOCATOR

M:      Tejun Heo <[email protected]>
M:      Christoph Lameter <[email protected]>
T:      git git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu.git
S:      Maintained
F:      include/linux/percpu*.h
F:      mm/percpu*.c
F:      arch/*/include/asm/percpu.h
Quoted 4 lines

Kind regards,
Sven

maintainer
#4 lore raw
Quoted 20 lines · On Saturday 03 November 2012 12:58:45 Shan Wei wrote:

Sven Eckelmann said, at 2012/11/3 1:55:

Quoted 19 lines · On Saturday 03 November 2012 00:02:06 Shan Wei wrote:
Quoted 17 lines

From: Shan Wei <[email protected]>

Quoted 9 lines · As Christoph Lameter

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.

---

Quoted 6 lines
Quoted 1 line

Is this really supposed to be the commit message?

Maybe it's ok when Linus said this. :-)

Christoph is the maintainer of per-cpu.
So........

Hm? This wasn't my question, but ok...

Kind regards,
Sven

#5 lore raw
In reply to Shan Wei
Quoted 5 lines · Shan Wei
Quoted 1 line

Is this really supposed to be the commit message?

Maybe it's ok when Linus said this. :-)

Christoph is the maintainer of per-cpu.

Well please make the changelog nice and understandable.