linux-kernel - Re: [PATCH] arm: rename CLOCK_TICK_RATE to ARM_TICK

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Date:	Wed, 13 May 2009 19:11:22 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Russell King <rmk+kernel@....linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] arm: rename CLOCK_TICK_RATE to ARM_TICK_RATE

On Tuesday 12 May 2009, Arnd Bergmann wrote:
> Most of the users of CLOCK_TICK_RATE in the kernel outside
> of ARM assume that it refers to the i8253 base frequency
> of 1.193182 Mhz, while in ARM it actually is the clock
> frequency of the timer.
> 
> By renaming it to ARM_TICK_RATE for all arm specific
> device drivers, we can hopefully reduce the amount
> of confusion slightly.

My patch was missing one important change to make this
a nonintrusive change:

--- a/arch/arm/include/asm/timex.h
+++ b/arch/arm/include/asm/timex.h
@@ -14,6 +14,8 @@
 
 #include <mach/timex.h>
 
+#define CLOCK_TICK_RATE ARM_TICK_RATE
+
 typedef unsigned long cycles_t;
 
 static inline cycles_t get_cycles (void)

	Arnd <><
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