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, 86 insertions, 0 deletions

diff --git a/kernel/arch/metag/include/asm/cmpxchg_lnkget.h b/kernel/arch/metag/include/asm/cmpxchg_lnkget.h
new file mode 100644
index 000000000..0154e2807
--- /dev/null
+++ b/kernel/arch/metag/include/asm/cmpxchg_lnkget.h
@@ -0,0 +1,86 @@
+#ifndef __ASM_METAG_CMPXCHG_LNKGET_H
+#define __ASM_METAG_CMPXCHG_LNKGET_H
+
+static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
+{
+	int temp, old;
+
+	smp_mb();
+
+	asm volatile (
+		      "1:	LNKGETD %1, [%2]\n"
+		      "	LNKSETD	[%2], %3\n"
+		      "	DEFR	%0, TXSTAT\n"
+		      "	ANDT	%0, %0, #HI(0x3f000000)\n"
+		      "	CMPT	%0, #HI(0x02000000)\n"
+		      "	BNZ	1b\n"
+#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
+		      "	DCACHE	[%2], %0\n"
+#endif
+		      : "=&d" (temp), "=&d" (old)
+		      : "da" (m), "da" (val)
+		      : "cc"
+		      );
+
+	smp_mb();
+
+	return old;
+}
+
+static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
+{
+	int temp, old;
+
+	smp_mb();
+
+	asm volatile (
+		      "1:	LNKGETD %1, [%2]\n"
+		      "	LNKSETD	[%2], %3\n"
+		      "	DEFR	%0, TXSTAT\n"
+		      "	ANDT	%0, %0, #HI(0x3f000000)\n"
+		      "	CMPT	%0, #HI(0x02000000)\n"
+		      "	BNZ	1b\n"
+#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
+		      "	DCACHE	[%2], %0\n"
+#endif
+		      : "=&d" (temp), "=&d" (old)
+		      : "da" (m), "da" (val & 0xff)
+		      : "cc"
+		      );
+
+	smp_mb();
+
+	return old;
+}
+
+static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
+					  unsigned long new)
+{
+	__u32 retval, temp;
+
+	smp_mb();
+
+	asm volatile (
+		      "1:	LNKGETD	%1, [%2]\n"
+		      "	CMP	%1, %3\n"
+		      "	LNKSETDEQ [%2], %4\n"
+		      "	BNE	2f\n"
+		      "	DEFR	%0, TXSTAT\n"
+		      "	ANDT	%0, %0, #HI(0x3f000000)\n"
+		      "	CMPT	%0, #HI(0x02000000)\n"
+		      "	BNZ	1b\n"
+#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
+		      "	DCACHE	[%2], %0\n"
+#endif
+		      "2:\n"
+		      : "=&d" (temp), "=&da" (retval)
+		      : "da" (m), "bd" (old), "da" (new)
+		      : "cc"
+		      );
+
+	smp_mb();
+
+	return retval;
+}
+
+#endif /* __ASM_METAG_CMPXCHG_LNKGET_H */