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, 50 insertions, 0 deletions

diff --git a/kernel/arch/frv/include/asm/delay.h b/kernel/arch/frv/include/asm/delay.h
new file mode 100644
index 000000000..597b4ebf0
--- /dev/null
+++ b/kernel/arch/frv/include/asm/delay.h
@@ -0,0 +1,50 @@
+/* delay.h: FRV delay code
+ *
+ * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * 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.
+ */
+
+#ifndef _ASM_DELAY_H
+#define _ASM_DELAY_H
+
+#include <asm/param.h>
+#include <asm/timer-regs.h>
+
+/*
+ * delay loop - runs at __core_clock_speed_HZ / 2 [there are 2 insns in the loop]
+ */
+extern unsigned long __delay_loops_MHz;
+
+static inline void __delay(unsigned long loops)
+{
+	asm volatile("1:	subicc	%0,#1,%0,icc0	\n"
+		     "		bnc	icc0,#2,1b	\n"
+		     : "=r" (loops)
+		     : "0" (loops)
+		     : "icc0"
+		     );
+}
+
+/*
+ * Use only for very small delays ( < 1 msec).  Should probably use a
+ * lookup table, really, as the multiplications take much too long with
+ * short delays.  This is a "reasonable" implementation, though (and the
+ * first constant multiplications gets optimized away if the delay is
+ * a constant)
+ */
+
+extern unsigned long loops_per_jiffy;
+
+static inline void udelay(unsigned long usecs)
+{
+	__delay(usecs * __delay_loops_MHz);
+}
+
+#define ndelay(n)	udelay((n) * 5)
+
+#endif /* _ASM_DELAY_H */