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Date: Mon, 17 Feb 2003 16:15:50 +0200
From: Matti Aarnio <matti.aarnio@zmailer.org>
To: =?iso-8859-1?Q?J=F6rn?= Engel <joern@wohnheim.fh-wedel.de>
Cc: Tim Schmielau <tim@physik3.uni-rostock.de>,
       Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>,
       Matti Aarnio <matti.aarnio@zmailer.org>,
       lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH *] use 64 bit jiffies
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References: <20030204092936.GA14495@wohnheim.fh-wedel.de> <Pine.LNX.4.33.0302041401010.1267-100000@gans.physik3.uni-rostock.de> <20030217135505.GF6282@wohnheim.fh-wedel.de>
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On Mon, Feb 17, 2003 at 02:55:05PM +0100, J?rn Engel wrote:

With:

> +#ifdef CONFIG_DEBUG_JIFFIESWRAP
> +  /* Make the jiffies counter wrap around sooner. */
> +# define INITIAL_JIFFIES ((unsigned long)(-300*HZ))
> +#else
> +# define INITIAL_JIFFIES 0
> +#endif

This will store constants into  jiffies_msb_flips:
("1" for DEBUG_JIFFIESWRAP, "0" otherwise.)
Wouldn't zero be what will always be needed ?

> -unsigned long volatile jiffies;
> +unsigned long volatile jiffies = INITIAL_JIFFIES;
>  #ifdef NEEDS_JIFFIES_64
> -static unsigned int volatile jiffies_msb_flips;
> +static unsigned int volatile
> +	jiffies_msb_flips = INITIAL_JIFFIES>>(BITS_PER_LONG-1);
>  #endif

/Matti Aarnio
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