linux-kernel - Re: [PATCH 04/14] parisc: Convert parisc to use read/update_persistent

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Date:	Sat, 06 Mar 2010 23:40:30 +0100
From:	Helge Deller <deller@....de>
To:	John Stultz <johnstul@...ibm.com>
CC:	lkml <linux-kernel@...r.kernel.org>,
	Kyle McMartin <kyle@...artin.ca>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 04/14] parisc: Convert parisc to use read/update_persistent_clock

On 03/04/2010 04:57 AM, John Stultz wrote:
> This patch converts the parisc architecture to use the generic read_persistent_clock and update_persistent_clock interfaces, reducing the amount of arch specific code we have to maintain, and allowing for further cleanups in the future.
>
> I have not built or tested this patch, so help from arch maintainers would be appreciated.

Works nicely.

Thanks, John.

Acked-by: Helge Deller <deller@....de>

>
> Cc: Kyle McMartin<kyle@...artin.ca>
> Cc: Helge Deller<deller@....de>
> Cc: Thomas Gleixner<tglx@...utronix.de>
> Cc: Andrew Morton<akpm@...ux-foundation.org>
>
> Signed-off-by: John Stultz<johnstul@...ibm.com>
> ---
>   arch/parisc/kernel/time.c |   29 +++++++++++++----------------
>   1 files changed, 13 insertions(+), 16 deletions(-)
>
> diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
> index a79c6f9..05511cc 100644
> --- a/arch/parisc/kernel/time.c
> +++ b/arch/parisc/kernel/time.c
> @@ -250,9 +250,21 @@ static int __init rtc_init(void)
>   }
>   module_init(rtc_init);
>
> -void __init time_init(void)
> +void read_persistent_clock(struct timespec *ts)
>   {
>   	static struct pdc_tod tod_data;
> +	if (pdc_tod_read(&tod_data) == 0) {
> +		ts->tv_sec = tod_data.tod_sec;
> +		ts->tv_nsec = tod_data.tod_usec * 1000;
> +	} else {
> +		printk(KERN_ERR "Error reading tod clock\n");
> +	        ts->tv_sec = 0;
> +		ts->tv_nsec = 0;
> +	}
> +}
> +
> +void __init time_init(void)
> +{
>   	unsigned long current_cr16_khz;
>
>   	clocktick = (100 * PAGE0->mem_10msec) / HZ;
> @@ -264,19 +276,4 @@ void __init time_init(void)
>   	clocksource_cr16.mult = clocksource_khz2mult(current_cr16_khz,
>   						clocksource_cr16.shift);
>   	clocksource_register(&clocksource_cr16);
> -
> -	if (pdc_tod_read(&tod_data) == 0) {
> -		unsigned long flags;
> -
> -		write_seqlock_irqsave(&xtime_lock, flags);
> -		xtime.tv_sec = tod_data.tod_sec;
> -		xtime.tv_nsec = tod_data.tod_usec * 1000;
> -		set_normalized_timespec(&wall_to_monotonic,
> -		                        -xtime.tv_sec, -xtime.tv_nsec);
> -		write_sequnlock_irqrestore(&xtime_lock, flags);
> -	} else {
> -		printk(KERN_ERR "Error reading tod clock\n");
> -	        xtime.tv_sec = 0;
> -		xtime.tv_nsec = 0;
> -	}
>   }

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