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

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 #ifndef _LINUX_CLOCKCHIPS_H
#define _LINUX_CLOCKCHIPS_H #define _LINUX_CLOCKCHIPS_H
#ifdef CONFIG_GENERIC_CLOCKEVENTS #ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD
#include <linux/clocksource.h> #include <linux/clocksource.h>
#include <linux/cpumask.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, extern int clockevents_program_event(struct clock_event_device *dev,
ktime_t expires, ktime_t now); ktime_t expires, ktime_t now);
#ifdef CONFIG_GENERIC_CLOCKEVENTS
extern void clockevents_notify(unsigned long reason, void *arg); extern void clockevents_notify(unsigned long reason, void *arg);
#else #else
# define clockevents_notify(reason, arg) do { } while (0)
#endif
#else /* CONFIG_GENERIC_CLOCKEVENTS_BUILD */
#define clockevents_notify(reason, arg) do { } while (0) #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 hardware is not capable then this option only increases
the size of the kernel image. 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-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) += tick-common.o
obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) += tick-broadcast.o obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) += tick-broadcast.o
obj-$(CONFIG_TICK_ONESHOT) += tick-oneshot.o obj-$(CONFIG_TICK_ONESHOT) += tick-oneshot.o

3
kernel/time/clockevents.c
View File

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