linux-kernel - [PATCH] AVR32: fix building warnings caused by redifinitions of HZ

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Date:	Sun,  7 Apr 2013 00:43:36 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	Jiang Liu <jiang.liu@...wei.com>,
	Haavard Skinnemoen <hskinnemoen@...il.com>,
	Hans-Christian Egtvedt <egtvedt@...fundet.no>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] AVR32: fix building warnings caused by redifinitions of HZ

Fix building warnings caused by redifinitions of HZ:
In file included from /ws/linux/kernel/linux.git/include/uapi/linux/param.h:4,
                 from include/linux/timex.h:63,
                 from include/linux/jiffies.h:8,
                 from include/linux/ktime.h:25,
                 from include/linux/timer.h:5,
                 from include/linux/workqueue.h:8,
                 from include/linux/srcu.h:34,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:777,
                 from include/linux/gfp.h:4,
                 from arch/avr32/mm/init.c:10:
/ws/linux/kernel/linux.git/arch/avr32/include/asm/param.h:6:1: warning: "HZ" redefined
In file included from /ws/linux/kernel/linux.git/arch/avr32/include/asm/param.h:4,
                 from /ws/linux/kernel/linux.git/include/uapi/linux/param.h:4,
                 from include/linux/timex.h:63,
                 from include/linux/jiffies.h:8,
                 from include/linux/ktime.h:25,
                 from include/linux/timer.h:5,
                 from include/linux/workqueue.h:8,
                 from include/linux/srcu.h:34,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:777,
                 from include/linux/gfp.h:4,
                 from arch/avr32/mm/init.c:10:
/ws/linux/kernel/linux.git/arch/avr32/include/uapi/asm/param.h:6:1: warning: this is the location of the previous definition

Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
Cc: Haavard Skinnemoen <hskinnemoen@...il.com>
Cc: Hans-Christian Egtvedt <egtvedt@...fundet.no>
Cc: linux-kernel@...r.kernel.org
---
 arch/avr32/include/uapi/asm/param.h |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/avr32/include/uapi/asm/param.h b/arch/avr32/include/uapi/asm/param.h
index d28aa5e..abda103 100644
--- a/arch/avr32/include/uapi/asm/param.h
+++ b/arch/avr32/include/uapi/asm/param.h
@@ -2,7 +2,11 @@
 #define _UAPI__ASM_AVR32_PARAM_H
 
 
-#ifndef HZ
+#ifndef __KERNEL__
+   /*
+    * Technically, this is wrong, but some old apps still refer to it.
+    * The proper way to get the HZ value is via sysconf(_SC_CLK_TCK).
+    */
 # define HZ		100
 #endif
 
-- 
1.7.9.5

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