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, 60 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-omap2/hwspinlock.c b/kernel/arch/arm/mach-omap2/hwspinlock.c
new file mode 100644
index 000000000..ef175acae
--- /dev/null
+++ b/kernel/arch/arm/mach-omap2/hwspinlock.c
@@ -0,0 +1,60 @@
+/*
+ * OMAP hardware spinlock device initialization
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Contact: Simon Que <sque@ti.com>
+ *          Hari Kanigeri <h-kanigeri2@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/hwspinlock.h>
+
+#include "soc.h"
+#include "omap_hwmod.h"
+#include "omap_device.h"
+
+static struct hwspinlock_pdata omap_hwspinlock_pdata __initdata = {
+	.base_id = 0,
+};
+
+static int __init hwspinlocks_init(void)
+{
+	int retval = 0;
+	struct omap_hwmod *oh;
+	struct platform_device *pdev;
+	const char *oh_name = "spinlock";
+	const char *dev_name = "omap_hwspinlock";
+
+	/*
+	 * Hwmod lookup will fail in case our platform doesn't support the
+	 * hardware spinlock module, so it is safe to run this initcall
+	 * on all omaps
+	 */
+	oh = omap_hwmod_lookup(oh_name);
+	if (oh == NULL)
+		return -EINVAL;
+
+	pdev = omap_device_build(dev_name, 0, oh, &omap_hwspinlock_pdata,
+				sizeof(struct hwspinlock_pdata));
+	if (IS_ERR(pdev)) {
+		pr_err("Can't build omap_device for %s:%s\n", dev_name,
+								oh_name);
+		retval = PTR_ERR(pdev);
+	}
+
+	return retval;
+}
+/* early board code might need to reserve specific hwspinlock instances */
+omap_postcore_initcall(hwspinlocks_init);