linux-kernel - [PATCH] percpu: fix generic definition of __this_cpu_add_and

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Date:	Sun, 19 Feb 2012 18:29:11 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	Tejun Heo <tj@...nel.org>,
	Christoph Lameter <cl@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] percpu: fix generic definition of __this_cpu_add_and_return()

This patch adds missed "__" into function prefix.
Otherwise on all archectures (except x86) it expands to irq/preemtion-safe
variant: _this_cpu_generic_add_return(), which do extra irq-save/irq-restore.
Optimal generic implementation is __this_cpu_generic_add_return().

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>
---
 include/linux/percpu.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 32cd1f6..3b609eb 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -718,7 +718,8 @@ do {									\
 # ifndef __this_cpu_add_return_8
 #  define __this_cpu_add_return_8(pcp, val)	__this_cpu_generic_add_return(pcp, val)
 # endif
-# define __this_cpu_add_return(pcp, val)	__pcpu_size_call_return2(this_cpu_add_return_, pcp, val)
+# define __this_cpu_add_return(pcp, val)	\
+	__pcpu_size_call_return2(__this_cpu_add_return_, pcp, val)
 #endif
 
 #define __this_cpu_sub_return(pcp, val)	this_cpu_add_return(pcp, -(val))

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