linux-kernel - [RFC PATCH v3 2/9] CPU hotplug: Convert preprocessor macros to static inline functions

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Message-ID: <20121207173829.27305.78586.stgit@srivatsabhat.in.ibm.com>
Date:	Fri, 07 Dec 2012 23:08:33 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	tglx@...utronix.de, peterz@...radead.org,
	paulmck@...ux.vnet.ibm.com, rusty@...tcorp.com.au,
	mingo@...nel.org, akpm@...ux-foundation.org, namhyung@...nel.org,
	vincent.guittot@...aro.org, tj@...nel.org, oleg@...hat.com
Cc:	sbw@....edu, amit.kucheria@...aro.org, rostedt@...dmis.org,
	rjw@...k.pl, srivatsa.bhat@...ux.vnet.ibm.com,
	wangyun@...ux.vnet.ibm.com, xiaoguangrong@...ux.vnet.ibm.com,
	nikunj@...ux.vnet.ibm.com, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH v3 2/9] CPU hotplug: Convert preprocessor macros to static
 inline functions

On 12/05/2012 06:10 AM, Andrew Morton wrote:
"static inline C functions would be preferred if possible.  Feel free to
fix up the wrong crufty surrounding code as well ;-)"

Convert the macros in the CPU hotplug code to static inline C functions.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
---

 include/linux/cpu.h |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index cf24da1..eb79f47 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -198,10 +198,10 @@ static inline void cpu_hotplug_driver_unlock(void)
 
 #else		/* CONFIG_HOTPLUG_CPU */
 
-#define get_online_cpus()	do { } while (0)
-#define put_online_cpus()	do { } while (0)
-#define get_online_cpus_atomic()	do { } while (0)
-#define put_online_cpus_atomic()	do { } while (0)
+static inline void get_online_cpus(void) {}
+static inline void put_online_cpus(void) {}
+static inline void get_online_cpus_atomic(void) {}
+static inline void put_online_cpus_atomic(void) {}
 #define hotcpu_notifier(fn, pri)	do { (void)(fn); } while (0)
 /* These aren't inline functions due to a GCC bug. */
 #define register_hotcpu_notifier(nb)	({ (void)(nb); 0; })

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