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, 40 insertions, 0 deletions

diff --git a/kernel/drivers/staging/board/board.c b/kernel/drivers/staging/board/board.c
new file mode 100644
index 000000000..d5a6abc84
--- /dev/null
+++ b/kernel/drivers/staging/board/board.c
@@ -0,0 +1,40 @@
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include "board.h"
+
+static bool find_by_address(u64 base_address)
+{
+	struct device_node *dn = of_find_all_nodes(NULL);
+	struct resource res;
+
+	while (dn) {
+		if (!of_address_to_resource(dn, 0, &res)) {
+			if (res.start == base_address) {
+				of_node_put(dn);
+				return true;
+			}
+		}
+		dn = of_find_all_nodes(dn);
+	}
+
+	return false;
+}
+
+bool __init board_staging_dt_node_available(const struct resource *resource,
+					    unsigned int num_resources)
+{
+	unsigned int i;
+
+	for (i = 0; i < num_resources; i++) {
+		const struct resource *r = resource + i;
+
+		if (resource_type(r) == IORESOURCE_MEM)
+			if (find_by_address(r->start))
+				return true; /* DT node available */
+	}
+
+	return false; /* Nothing found */
+}