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clockevents: Allow build w/o run-tine usage for migration purposes

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Migration aid to allow preparatory patches which introduce not yet
used parts of clock events code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
This commit is contained in:
Thomas Gleixner 2007-10-12 23:04:05 +02:00 committed by Thomas Gleixner
parent 7f8033b76c
commit de68d9b173
4 changed files with 14 additions and 4 deletions
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8
include/linux/clockchips.h
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@ -8,7 +8,7 @@
#ifndef _LINUX_CLOCKCHIPS_H
#define _LINUX_CLOCKCHIPS_H
#ifdef CONFIG_GENERIC_CLOCKEVENTS
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD
#include <linux/clocksource.h>
#include <linux/cpumask.h>
@ -126,9 +126,13 @@ extern int clockevents_register_notifier(struct notifier_block *nb);
extern int clockevents_program_event(struct clock_event_device *dev,
ktime_t expires, ktime_t now);
#ifdef CONFIG_GENERIC_CLOCKEVENTS
extern void clockevents_notify(unsigned long reason, void *arg);
#else
# define clockevents_notify(reason, arg) do { } while (0)
#endif
#else /* CONFIG_GENERIC_CLOCKEVENTS_BUILD */
#define clockevents_notify(reason, arg) do { } while (0)

5
kernel/time/Kconfig
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@ -23,3 +23,8 @@ config HIGH_RES_TIMERS
hardware is not capable then this option only increases
the size of the kernel image.
config GENERIC_CLOCKEVENTS_BUILD
bool
default y
depends on GENERIC_CLOCKEVENTS || GENERIC_CLOCKEVENTS_MIGR

2
kernel/time/Makefile
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@ -1,6 +1,6 @@
obj-y += timekeeping.o ntp.o clocksource.o jiffies.o timer_list.o
obj-$(CONFIG_GENERIC_CLOCKEVENTS) += clockevents.o
obj-$(CONFIG_GENERIC_CLOCKEVENTS_BUILD) += clockevents.o
obj-$(CONFIG_GENERIC_CLOCKEVENTS) += tick-common.o
obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) += tick-broadcast.o
obj-$(CONFIG_TICK_ONESHOT) += tick-oneshot.o

3
kernel/time/clockevents.c
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@ -194,6 +194,7 @@ void clockevents_exchange_device(struct clock_event_device *old,
local_irq_restore(flags);
}
#ifdef CONFIG_GENERIC_CLOCKEVENTS
/**
* clockevents_notify - notification about relevant events
*/
@ -222,4 +223,4 @@ void clockevents_notify(unsigned long reason, void *arg)
spin_unlock(&clockevents_lock);
}
EXPORT_SYMBOL_GPL(clockevents_notify);
#endif