From: Mattias Wallin <mattias.wallin@stericsson.com>
To: Stephen Boyd <sboyd@codeaurora.org>
Cc: Russell King <linux@arm.linux.org.uk>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Saravana Kannan <skannan@codeaurora.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Walleij <linus.walleij@linaro.org>
Subject: Re: [PATCHv5 1/3] ARM: Translate delay.S into (mostly) C
Date: Wed, 6 Apr 2011 10:49:20 +0200 [thread overview]
Message-ID: <4D9C2910.6020309@stericsson.com> (raw)
In-Reply-To: <1302047800-26720-2-git-send-email-sboyd@codeaurora.org>
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
next prev parent reply other threads:[~2011-04-06 8:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-05 23:56 [PATCHv5 0/3] Constant udelay() for SMP and non-SMP systems Stephen Boyd
2011-04-05 23:56 ` [PATCHv5 1/3] ARM: Translate delay.S into (mostly) C Stephen Boyd
2011-04-06 8:49 ` Mattias Wallin [this message]
2011-04-06 17:34 ` Stephen Boyd
2011-04-07 1:27 ` Saravana Kannan
2011-04-07 7:27 ` Mattias Wallin
2011-04-07 7:29 ` Mattias Wallin
2011-04-05 23:56 ` [PATCHv5 2/3] ARM: Allow machines to override __delay() Stephen Boyd
2011-04-07 7:30 ` Mattias Wallin
2011-04-05 23:56 ` [PATCHv5 3/3] ARM: Implement a timer based __delay() loop Stephen Boyd
2011-04-07 7:30 ` Mattias Wallin
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