netdev - Re: [PATCH V9 08/13] posix clocks: cleanup the CLOCK

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Date:	Thu, 13 Jan 2011 18:03:24 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Richard Cochran <richardcochran@...il.com>
cc:	linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
	netdev@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Christoph Lameter <cl@...ux.com>,
	David Miller <davem@...emloft.net>,
	John Stultz <johnstul@...ibm.com>,
	Krzysztof Halasa <khc@...waw.pl>,
	Peter Zijlstra <peterz@...radead.org>,
	Rodolfo Giometti <giometti@...ux.it>
Subject: Re: [PATCH V9 08/13] posix clocks: cleanup the CLOCK_DISPTACH
 macro

On Thu, 13 Jan 2011, Richard Cochran wrote:
>  int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *ts);
>  int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *ts);
> -int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *ts);
> +int posix_cpu_clock_set(const clockid_t which_clock, struct timespec *ts);

Shouldn't we change the clock_set function to have *ts const in all places ?

>  static int posix_ktime_get_ts(clockid_t which_clock, struct timespec *tp)
> @@ -279,12 +230,29 @@ static __init int init_posix_timers(void)
>  {
>  	struct k_clock clock_realtime = {
>  		.clock_getres = hrtimer_get_res,
> +		/* defaults: */
> +		.clock_adj	= common_clock_adj,
> +		.clock_get	= common_clock_get,
> +		.clock_set	= common_clock_set,
> +		.nsleep		= common_nsleep,
> +		.nsleep_restart	= common_nsleep_restart,
> +		.timer_create	= common_timer_create,
> +		.timer_del	= common_timer_del,
> +		.timer_get	= common_timer_get,
> +		.timer_set	= common_timer_set,
>  	};
>  	struct k_clock clock_monotonic = {
>  		.clock_getres = hrtimer_get_res,
>  		.clock_get = posix_ktime_get_ts,
>  		.clock_set = do_posix_clock_nosettime,
>  		.clock_adj = do_posix_clock_noadjtime,
> +		/* defaults: */
> +		.nsleep		= common_nsleep,
> +		.nsleep_restart	= common_nsleep_restart,
> +		.timer_create	= common_timer_create,
> +		.timer_del	= common_timer_del,
> +		.timer_get	= common_timer_get,
> +		.timer_set	= common_timer_set,
>  	};
>  	struct k_clock clock_monotonic_raw = {
>  		.clock_getres = hrtimer_get_res,
> @@ -293,6 +261,11 @@ static __init int init_posix_timers(void)
>  		.clock_adj = do_posix_clock_noadjtime,
>  		.timer_create = no_timer_create,
>  		.nsleep = no_nsleep,
> +		/* defaults: */
> +		.nsleep_restart	= common_nsleep_restart,
> +		.timer_del	= common_timer_del,
> +		.timer_get	= common_timer_get,
> +		.timer_set	= common_timer_set,

Hmm, we do not need to set functional entries for clocks which neither
implement timer_create nor nsleep.

Otherwise I really like the outcome. :)

Thanks for your patience !

       tglx
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