linux-kernel - Re: [PATCH] sparc64: use unsigned long long for u64

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Message-ID: <b040c32a0812230929u282f0f2bn9221bf2e176d82eb@mail.gmail.com>
Date:	Tue, 23 Dec 2008 09:29:52 -0800
From:	Ken Chen <kenchen@...gle.com>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	sparclinux <sparclinux@...r.kernel.org>, mingo@...e.hu,
	sfr@...b.auug.org.au, linux-kernel@...r.kernel.org,
	paulus@...ba.org, tglx@...utronix.de, hpa@...or.com,
	linux-next@...r.kernel.org
Subject: Re: [PATCH] sparc64: use unsigned long long for u64

On Tue, Dec 23, 2008 at 9:26 AM, Sam Ravnborg <sam@...nborg.org> wrote:
>> wait, why does this need to be changed?
>
> We have:
>        clocksource_tick.read = tick_ops->get_tick;
>
> And clocksource_tick is of type clocksource:
>
> struct clocksource {
>        ...
>        cycle_t (*read)(void);
>
> And cycle_t is:
> /* clocksource cycle base type */
> typedef u64 cycle_t;
>
> And u64 is now:
> unsigned long long - thus we need to fix prototype
> of get_tick to fix the warnings.
>
> A cast could do it - but fixing the real problem
> is better here.

Sounds good to me.  It was just a question.  Thank you for the explanation.

- Ken
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