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, 55 insertions, 0 deletions

diff --git a/kernel/tools/perf/util/unwind.h b/kernel/tools/perf/util/unwind.h
new file mode 100644
index 000000000..12790cf94
--- /dev/null
+++ b/kernel/tools/perf/util/unwind.h
@@ -0,0 +1,55 @@
+#ifndef __UNWIND_H
+#define __UNWIND_H
+
+#include <linux/types.h>
+#include "event.h"
+#include "symbol.h"
+#include "thread.h"
+
+struct unwind_entry {
+	struct map	*map;
+	struct symbol	*sym;
+	u64		ip;
+};
+
+typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
+
+#ifdef HAVE_DWARF_UNWIND_SUPPORT
+int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
+			struct thread *thread,
+			struct perf_sample *data, int max_stack);
+/* libunwind specific */
+#ifdef HAVE_LIBUNWIND_SUPPORT
+int libunwind__arch_reg_id(int regnum);
+int unwind__prepare_access(struct thread *thread);
+void unwind__flush_access(struct thread *thread);
+void unwind__finish_access(struct thread *thread);
+#else
+static inline int unwind__prepare_access(struct thread *thread __maybe_unused)
+{
+	return 0;
+}
+
+static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
+static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
+#endif
+#else
+static inline int
+unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
+		    void *arg __maybe_unused,
+		    struct thread *thread __maybe_unused,
+		    struct perf_sample *data __maybe_unused,
+		    int max_stack __maybe_unused)
+{
+	return 0;
+}
+
+static inline int unwind__prepare_access(struct thread *thread __maybe_unused)
+{
+	return 0;
+}
+
+static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
+static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
+#endif /* HAVE_DWARF_UNWIND_SUPPORT */
+#endif /* __UNWIND_H */