linux-kernel - Re: [PATCH] Provide u64 version of jiffies_to

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Message-Id: <200803130053.25259.zippel@linux-m68k.org>
Date:	Thu, 13 Mar 2008 00:53:22 +0100
From:	Roman Zippel <zippel@...ux-m68k.org>
To:	Jonathan Lim <jlim@....com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	randy.dunlap@...cle.com
Subject: Re: [PATCH] Provide u64 version of jiffies_to_usecs() in kernel/tsacct.c

Hi,

On Monday 25. February 2008, Jonathan Lim wrote:

> +u64 jiffies_64_to_usecs(const u64 j)
> +{
> +	return div64_64(j*HZ_TO_USEC_NUM + HZ_TO_USEC_DEN-1, HZ_TO_USEC_DEN);
> +}
> +EXPORT_SYMBOL(jiffies_64_to_usecs);

Please also adapt the "BITS_PER_LONG == 32" part from jiffies_to_usecs(), it 
should provide enough resolution to avoid the div64_64() here.

bye, Roman
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