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authorThomas Gleixner <tglx@linutronix.de>2013-04-25 22:31:50 +0200
committerThomas Gleixner <tglx@linutronix.de>2013-05-16 11:09:18 +0200
commit03e13cf5ee60584fe0c831682c67212effb7fca4 (patch)
treeb40a9a0a88a675e4511ad6b6c0bf072b6a1ef9f4 /kernel/time/tick-internal.h
parentclockevents: Split out selection logic (diff)
downloadlinux-03e13cf5ee60584fe0c831682c67212effb7fca4.tar.xz
linux-03e13cf5ee60584fe0c831682c67212effb7fca4.zip
clockevents: Implement unbind functionality
Provide a sysfs interface to allow unbinding of clockevent devices. The device is unbound if it is unused or if there is a replacement device available. Unbinding of broadcast devices is not supported as we don't want to foster that nonsense. If no replacement device is available the unbind returns -EBUSY. Unbind is available from the kernel and through sysfs, which is necessary to drop the module refcount. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Magnus Damm <magnus.damm@gmail.com> Link: http://lkml.kernel.org/r/20130425143436.499216659@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time/tick-internal.h')
-rw-r--r--kernel/time/tick-internal.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index 06bfc8802dfb..be1690eaecff 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -11,6 +11,8 @@ extern seqlock_t jiffies_lock;
#define TICK_DO_TIMER_NONE -1
#define TICK_DO_TIMER_BOOT -2
+#define CS_NAME_LEN 32
+
DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
extern ktime_t tick_next_period;
extern ktime_t tick_period;
@@ -23,9 +25,14 @@ extern void tick_handover_do_timer(int *cpup);
extern void tick_shutdown(unsigned int *cpup);
extern void tick_suspend(void);
extern void tick_resume(void);
+extern bool tick_check_replacement(struct clock_event_device *curdev,
+ struct clock_event_device *newdev);
+extern void tick_install_replacement(struct clock_event_device *dev);
extern void clockevents_shutdown(struct clock_event_device *dev);
+extern size_t sysfs_get_uname(const char *buf, char *dst, size_t cnt);
+
/*
* NO_HZ / high resolution timer shared code
*/