linux-kernel - Re: [PATCHv5 1/3] ARM: Translate delay.S into (mostly) C

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Message-ID: <4D9C2910.6020309@stericsson.com>
Date:	Wed, 6 Apr 2011 10:49:20 +0200
From:	Mattias Wallin <mattias.wallin@...ricsson.com>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Russell King <linux@....linux.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Saravana Kannan <skannan@...eaurora.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCHv5 1/3] ARM: Translate delay.S into (mostly) C

On 04/06/2011 01:56 AM, Stephen Boyd wrote:
> +void __udelay(unsigned long usecs)
> +{
> +	__const_udelay(usecs * ((2199023*HZ)>>11));
This will overflow if HZ=1000.
If I remember correct I fixed it like this:
__const_udelay(usecs * ((2199023UL*HZ)>>11));

/Mattias Wallin
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