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, 80 insertions, 0 deletions

diff --git a/kernel/drivers/isdn/gigaset/proc.c b/kernel/drivers/isdn/gigaset/proc.c
new file mode 100644
index 000000000..e3f9d0f08
--- /dev/null
+++ b/kernel/drivers/isdn/gigaset/proc.c
@@ -0,0 +1,80 @@
+/*
+ * Stuff used by all variants of the driver
+ *
+ * Copyright (c) 2001 by Stefan Eilers,
+ *                       Hansjoerg Lipp <hjlipp@web.de>,
+ *                       Tilman Schmidt <tilman@imap.cc>.
+ *
+ * =====================================================================
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License as
+ *	published by the Free Software Foundation; either version 2 of
+ *	the License, or (at your option) any later version.
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+
+static ssize_t show_cidmode(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct cardstate *cs = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%u\n", cs->cidmode);
+}
+
+static ssize_t set_cidmode(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct cardstate *cs = dev_get_drvdata(dev);
+	long int value;
+	char *end;
+
+	value = simple_strtol(buf, &end, 0);
+	while (*end)
+		if (!isspace(*end++))
+			return -EINVAL;
+	if (value < 0 || value > 1)
+		return -EINVAL;
+
+	if (mutex_lock_interruptible(&cs->mutex))
+		return -ERESTARTSYS;
+
+	cs->waiting = 1;
+	if (!gigaset_add_event(cs, &cs->at_state, EV_PROC_CIDMODE,
+			       NULL, value, NULL)) {
+		cs->waiting = 0;
+		mutex_unlock(&cs->mutex);
+		return -ENOMEM;
+	}
+	gigaset_schedule_event(cs);
+
+	wait_event(cs->waitqueue, !cs->waiting);
+
+	mutex_unlock(&cs->mutex);
+
+	return count;
+}
+
+static DEVICE_ATTR(cidmode, S_IRUGO | S_IWUSR, show_cidmode, set_cidmode);
+
+/* free sysfs for device */
+void gigaset_free_dev_sysfs(struct cardstate *cs)
+{
+	if (!cs->tty_dev)
+		return;
+
+	gig_dbg(DEBUG_INIT, "removing sysfs entries");
+	device_remove_file(cs->tty_dev, &dev_attr_cidmode);
+}
+
+/* initialize sysfs for device */
+void gigaset_init_dev_sysfs(struct cardstate *cs)
+{
+	if (!cs->tty_dev)
+		return;
+
+	gig_dbg(DEBUG_INIT, "setting up sysfs");
+	if (device_create_file(cs->tty_dev, &dev_attr_cidmode))
+		pr_err("could not create sysfs attribute\n");
+}