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, 99 insertions, 0 deletions

diff --git a/kernel/drivers/staging/speakup/fakekey.c b/kernel/drivers/staging/speakup/fakekey.c
new file mode 100644
index 000000000..4299cf45f
--- /dev/null
+++ b/kernel/drivers/staging/speakup/fakekey.c
@@ -0,0 +1,99 @@
+/* fakekey.c
+ * Functions for simulating keypresses.
+ *
+ * Copyright (C) 2010 the Speakup Team
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/preempt.h>
+#include <linux/percpu.h>
+#include <linux/input.h>
+
+#include "speakup.h"
+
+#define PRESSED 1
+#define RELEASED 0
+
+static DEFINE_PER_CPU(bool, reporting_keystroke);
+
+static struct input_dev *virt_keyboard;
+
+int speakup_add_virtual_keyboard(void)
+{
+	int err;
+
+	virt_keyboard = input_allocate_device();
+
+	if (!virt_keyboard)
+		return -ENOMEM;
+
+	virt_keyboard->name = "Speakup";
+	virt_keyboard->id.bustype = BUS_VIRTUAL;
+	virt_keyboard->phys = "speakup/input0";
+	virt_keyboard->dev.parent = NULL;
+
+	__set_bit(EV_KEY, virt_keyboard->evbit);
+	__set_bit(KEY_DOWN, virt_keyboard->keybit);
+
+	err = input_register_device(virt_keyboard);
+	if (err) {
+		input_free_device(virt_keyboard);
+		virt_keyboard = NULL;
+	}
+
+	return err;
+}
+
+void speakup_remove_virtual_keyboard(void)
+{
+	if (virt_keyboard != NULL) {
+		input_unregister_device(virt_keyboard);
+		virt_keyboard = NULL;
+	}
+}
+
+/*
+	 * Send a simulated down-arrow to the application.
+	 */
+void speakup_fake_down_arrow(void)
+{
+	unsigned long flags;
+
+	/* disable keyboard interrupts */
+	local_irq_save(flags);
+	/* don't change CPU */
+	preempt_disable();
+
+	__this_cpu_write(reporting_keystroke, true);
+	input_report_key(virt_keyboard, KEY_DOWN, PRESSED);
+	input_report_key(virt_keyboard, KEY_DOWN, RELEASED);
+	__this_cpu_write(reporting_keystroke, false);
+
+	/* reenable preemption */
+	preempt_enable();
+	/* reenable keyboard interrupts */
+	local_irq_restore(flags);
+}
+
+/*
+	 * Are we handling a simulated keypress on the current CPU?
+	 * Returns a boolean.
+	 */
+bool speakup_fake_key_pressed(void)
+{
+	return this_cpu_read(reporting_keystroke);
+}