From: Franck Bui-Huu <vagabon.xyz@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@elte.hu>,
Andi Kleen <ak@suse.de>, Chris Wright <chrisw@sous-sol.org>,
Arjan van de Ven <arjan@infradead.org>,
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
john stultz <johnstul@us.ibm.com>,
David Miller <davem@davemloft.net>
Subject: Re: [patch-mm 14/25] NTP: Move the cmos update code into ntp.c
Date: Tue, 19 Jun 2007 10:26:59 +0200 [thread overview]
Message-ID: <46779353.7010709@innova-card.com> (raw)
In-Reply-To: <20070616101637.068394614@inhelltoy.tec.linutronix.de>
Hi Thomas,
Thomas Gleixner wrote:
> i386 and sparc64 have the identical code to update the cmos clock.
> Move it into kernel/time/ntp.c as there are other architectures
> coming along with the same requirements.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Cc: Chris Wright <chrisw@sous-sol.org>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: john stultz <johnstul@us.ibm.com>
> Cc: David Miller <davem@davemloft.net>
>
> ---
> arch/i386/Kconfig | 4 +++
> arch/i386/kernel/time.c | 50 +-------------------------------------
> arch/sparc64/Kconfig | 4 +++
> arch/sparc64/kernel/time.c | 53 +---------------------------------------
> include/asm-i386/timer.h | 1
> include/linux/time.h | 2 +
> kernel/time/ntp.c | 59 ++++++++++++++++++++++++++++++++++++++++++---
> 7 files changed, 70 insertions(+), 103 deletions(-)
>
[snip]
> /* Kick start a stopped clock (procedure from the Sun NVRAM/hostid FAQ). */
> Index: linux-2.6.22-rc4-mm/include/linux/time.h
> ===================================================================
> --- linux-2.6.22-rc4-mm.orig/include/linux/time.h 2007-06-16 12:10:21.000000000 +0200
> +++ linux-2.6.22-rc4-mm/include/linux/time.h 2007-06-16 12:10:24.000000000 +0200
> @@ -93,6 +93,8 @@ extern struct timespec wall_to_monotonic
> extern seqlock_t xtime_lock __attribute__((weak));
>
> extern unsigned long read_persistent_clock(void);
> +extern int update_persistent_clock(struct timespec now);
I'm wondering if update_persistent_clock shouldn't be part of
"drivers/rtc/*" framework. Do you have any idea on how this
is going to be implemented on platforms that use this framework ?
> +extern int no_sync_cmos_clock __read_mostly;
> void timekeeping_init(void);
>
> static inline unsigned long get_seconds(void)
> Index: linux-2.6.22-rc4-mm/kernel/time/ntp.c
> ===================================================================
> --- linux-2.6.22-rc4-mm.orig/kernel/time/ntp.c 2007-06-16 12:10:21.000000000 +0200
> +++ linux-2.6.22-rc4-mm/kernel/time/ntp.c 2007-06-16 12:10:24.000000000 +0200
> @@ -10,6 +10,7 @@
>
> #include <linux/mm.h>
> #include <linux/time.h>
> +#include <linux/timer.h>
> #include <linux/timex.h>
> #include <linux/jiffies.h>
> #include <linux/hrtimer.h>
> @@ -187,12 +188,64 @@ u64 current_tick_length(void)
> return tick_length;
> }
>
> +#ifdef CONFIG_GENERIC_CMOS_UPDATE
>
> -void __attribute__ ((weak)) notify_arch_cmos_timer(void)
> +/* Disable the cmos update - used by virtualization and embedded */
> +int no_sync_cmos_clock __read_mostly;
> +
[snip]
>
> +static void notify_cmos_timer(void)
> +{
> + if (no_sync_cmos_clock)
> + mod_timer(&sync_cmos_timer, jiffies + 1);
> +}
Isn't the test condition wrong ? Shouldn't it be:
if (!no_sync_cmos_clock)
mod_timer(&sync_cmos_timer, jiffies + 1);
Thanks,
Franck
next prev parent reply other threads:[~2007-06-19 8:26 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-16 10:36 [patch-mm 00/25] High resolution timer updates and x86_64 support - V2 Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 01/25] NOHZ: Fix nox x86 dyntick idle handling Thomas Gleixner
2007-06-16 14:36 ` Bernhard Rosenkraenzer
2007-06-16 14:54 ` Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 02/25] ACPI: Move timer broadcast and pmtimer access before C3 arbiter shutdown Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 03/25] Clockevents remove prototypes of removed functions Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 04/25] Timekeeping: Fixup shadow variable argument Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 05/25] timer.c cleanup recently introduced whitespace damage Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 06/25] clockevents: Fix resume logic Thomas Gleixner
2007-06-16 18:51 ` Separate arch patching (Re: [patch-mm 06/25] clockevents: Fix resume logic) Oleg Verych
2007-06-16 19:04 ` Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 07/25] Tick management: spread timer interrupt Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 08/25] i386: PIT stop only, when in periodic or oneshot mode Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 09/25] clockevents: Fix device replacement Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 10/25] highres: Improve debug output Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 11/25] hrtimer: speedup hrtimer_enqueue Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 12/25] pcspkr: use the global PIT lock Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 13/25] i386: hpet assumes boot cpu is 0 Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 14/25] NTP: Move the cmos update code into ntp.c Thomas Gleixner
2007-06-19 8:26 ` Franck Bui-Huu [this message]
2007-06-16 10:36 ` [patch-mm 15/25] clocksource: add settimeofday hook for PPC Thomas Gleixner
2007-06-16 15:51 ` Daniel Walker
2007-06-20 6:57 ` [RFC] clocksouce implementation for powerpc Tony Breeds
2007-06-20 14:57 ` Daniel Walker
2007-06-20 17:20 ` Sergei Shtylyov
2007-06-20 17:31 ` Thomas Gleixner
2007-06-20 18:11 ` Sergei Shtylyov
2007-06-22 6:23 ` Tony Breeds
2007-06-20 16:53 ` Sergei Shtylyov
2007-06-22 6:10 ` Tony Breeds
2007-06-22 12:42 ` Sergei Shtylyov
2007-06-20 21:06 ` john stultz
2007-06-22 6:28 ` Tony Breeds
2007-06-16 10:36 ` [patch-mm 16/25] x86_64: untangle asm/hpet.h from asm/timex.h Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 17/25] x86_64: Use generic cmos update Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 18/25] i386: move setup_pit_timer to the correct header file Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 19/25] x86-64: remove dead code and other janitor work in tsc.c Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 20/25] x86_64: Convert to cleckevents Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 21/25] x86_64: hpet restore vread Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 22/25] x86_64: restore restore nohpet cmdline Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 23/25] x86-64 block irq balancing for timer Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 24/25] x86_64: prep idle loop for dynticks Thomas Gleixner
2007-06-16 10:36 ` [patch-mm 25/25] x86_64: enable high resolution timers and dynticks Thomas Gleixner
2007-06-16 14:41 ` [patch-mm 00/25] High resolution timer updates and x86_64 support - V2 Alistair John Strachan
2007-06-16 19:06 ` Thomas Gleixner
2007-06-16 23:04 ` Nigel Cunningham
2007-06-18 20:06 ` Valdis.Kletnieks
2007-06-18 20:24 ` Pallipadi, Venkatesh
2007-06-18 21:49 ` Valdis.Kletnieks
2007-06-18 22:10 ` Pallipadi, Venkatesh
2007-06-19 11:28 ` Valdis.Kletnieks
2007-06-19 1:52 ` Arjan van de Ven
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