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, 38 insertions, 0 deletions

diff --git a/kernel/arch/x86/oprofile/init.c b/kernel/arch/x86/oprofile/init.c
new file mode 100644
index 000000000..9e138d00a
--- /dev/null
+++ b/kernel/arch/x86/oprofile/init.c
@@ -0,0 +1,38 @@
+/**
+ * @file init.c
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon <levon@movementarian.org>
+ */
+
+#include <linux/oprofile.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+
+/*
+ * We support CPUs that have performance counters like the Pentium Pro
+ * with the NMI mode driver.
+ */
+
+#ifdef CONFIG_X86_LOCAL_APIC
+extern int op_nmi_init(struct oprofile_operations *ops);
+extern void op_nmi_exit(void);
+#else
+static int op_nmi_init(struct oprofile_operations *ops) { return -ENODEV; }
+static void op_nmi_exit(void) { }
+#endif
+
+extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+	ops->backtrace = x86_backtrace;
+	return op_nmi_init(ops);
+}
+
+void oprofile_arch_exit(void)
+{
+	op_nmi_exit();
+}