linux-kernel - Re: [PATCH 04/27] asm-generic: add legacy I/O header files

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Date:	Fri, 1 May 2009 14:53:31 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Russell King <rmk+lkml@....linux.org.uk>
Cc:	Michal Simek <monstr@...str.eu>, linux-arch@...r.kernel.org,
	Remis Lima Baima <remis.developer@...glemail.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/27] asm-generic: add legacy I/O header files

On Friday 01 May 2009, Russell King wrote:
> > > All of these are either PC-specific, or they don't actually care
> > > about the specific value. Most architectures just use the
> > > value from the IBM PC, so we might as well make that the generic
> > > default.
> > 
> > ok. Let's move out from arch to generic location.
> 
> That's only possible once the users have been fixed - otherwise the ARM
> stuff listed above _will_ break.

My idea was to just add a fallback of

#ifndef CLOCK_TICK_RATE
#define CLOCK_TICK_RATE                1193182
#endif

to include/linux/timex.h. Since al existing architectures already define
CLOCK_TICK_RATE as a macro, I don't see anything changing for them.

The only difference would be that all architectures that use the default
value can have an empty timex.h.

Am I missing something?

	Arnd <><
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