Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/kernel/include/linux/alarmtimer.h b/kernel/include/linux/alarmtimer.h
new file mode 100644
index 000000000..a899402a5
--- /dev/null
+++ b/kernel/include/linux/alarmtimer.h
@@ -0,0 +1,59 @@
+#ifndef _LINUX_ALARMTIMER_H
+#define _LINUX_ALARMTIMER_H
+
+#include <linux/time.h>
+#include <linux/hrtimer.h>
+#include <linux/timerqueue.h>
+#include <linux/rtc.h>
+
+enum alarmtimer_type {
+	ALARM_REALTIME,
+	ALARM_BOOTTIME,
+
+	ALARM_NUMTYPE,
+};
+
+enum alarmtimer_restart {
+	ALARMTIMER_NORESTART,
+	ALARMTIMER_RESTART,
+};
+
+
+#define ALARMTIMER_STATE_INACTIVE	0x00
+#define ALARMTIMER_STATE_ENQUEUED	0x01
+
+/**
+ * struct alarm - Alarm timer structure
+ * @node:	timerqueue node for adding to the event list this value
+ *		also includes the expiration time.
+ * @period:	Period for recuring alarms
+ * @function:	Function pointer to be executed when the timer fires.
+ * @type:	Alarm type (BOOTTIME/REALTIME)
+ * @enabled:	Flag that represents if the alarm is set to fire or not
+ * @data:	Internal data value.
+ */
+struct alarm {
+	struct timerqueue_node	node;
+	struct hrtimer		timer;
+	enum alarmtimer_restart	(*function)(struct alarm *, ktime_t now);
+	enum alarmtimer_type	type;
+	int			state;
+	void			*data;
+};
+
+void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
+		enum alarmtimer_restart (*function)(struct alarm *, ktime_t));
+int alarm_start(struct alarm *alarm, ktime_t start);
+int alarm_start_relative(struct alarm *alarm, ktime_t start);
+void alarm_restart(struct alarm *alarm);
+int alarm_try_to_cancel(struct alarm *alarm);
+int alarm_cancel(struct alarm *alarm);
+
+u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval);
+u64 alarm_forward_now(struct alarm *alarm, ktime_t interval);
+ktime_t alarm_expires_remaining(const struct alarm *alarm);
+
+/* Provide way to access the rtc device being used by alarmtimers */
+struct rtc_device *alarmtimer_get_rtcdev(void);
+
+#endif