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, 84 insertions, 0 deletions

diff --git a/kernel/drivers/oprofile/oprofile_stats.c b/kernel/drivers/oprofile/oprofile_stats.c
new file mode 100644
index 000000000..59659cea4
--- /dev/null
+++ b/kernel/drivers/oprofile/oprofile_stats.c
@@ -0,0 +1,84 @@
+/**
+ * @file oprofile_stats.c
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon
+ */
+
+#include <linux/oprofile.h>
+#include <linux/smp.h>
+#include <linux/cpumask.h>
+#include <linux/threads.h>
+
+#include "oprofile_stats.h"
+#include "cpu_buffer.h"
+
+struct oprofile_stat_struct oprofile_stats;
+
+void oprofile_reset_stats(void)
+{
+	struct oprofile_cpu_buffer *cpu_buf;
+	int i;
+
+	for_each_possible_cpu(i) {
+		cpu_buf = &per_cpu(op_cpu_buffer, i);
+		cpu_buf->sample_received = 0;
+		cpu_buf->sample_lost_overflow = 0;
+		cpu_buf->backtrace_aborted = 0;
+		cpu_buf->sample_invalid_eip = 0;
+	}
+
+	atomic_set(&oprofile_stats.sample_lost_no_mm, 0);
+	atomic_set(&oprofile_stats.sample_lost_no_mapping, 0);
+	atomic_set(&oprofile_stats.event_lost_overflow, 0);
+	atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
+	atomic_set(&oprofile_stats.multiplex_counter, 0);
+}
+
+
+void oprofile_create_stats_files(struct dentry *root)
+{
+	struct oprofile_cpu_buffer *cpu_buf;
+	struct dentry *cpudir;
+	struct dentry *dir;
+	char buf[10];
+	int i;
+
+	dir = oprofilefs_mkdir(root, "stats");
+	if (!dir)
+		return;
+
+	for_each_possible_cpu(i) {
+		cpu_buf = &per_cpu(op_cpu_buffer, i);
+		snprintf(buf, 10, "cpu%d", i);
+		cpudir = oprofilefs_mkdir(dir, buf);
+
+		/* Strictly speaking access to these ulongs is racy,
+		 * but we can't simply lock them, and they are
+		 * informational only.
+		 */
+		oprofilefs_create_ro_ulong(cpudir, "sample_received",
+			&cpu_buf->sample_received);
+		oprofilefs_create_ro_ulong(cpudir, "sample_lost_overflow",
+			&cpu_buf->sample_lost_overflow);
+		oprofilefs_create_ro_ulong(cpudir, "backtrace_aborted",
+			&cpu_buf->backtrace_aborted);
+		oprofilefs_create_ro_ulong(cpudir, "sample_invalid_eip",
+			&cpu_buf->sample_invalid_eip);
+	}
+
+	oprofilefs_create_ro_atomic(dir, "sample_lost_no_mm",
+		&oprofile_stats.sample_lost_no_mm);
+	oprofilefs_create_ro_atomic(dir, "sample_lost_no_mapping",
+		&oprofile_stats.sample_lost_no_mapping);
+	oprofilefs_create_ro_atomic(dir, "event_lost_overflow",
+		&oprofile_stats.event_lost_overflow);
+	oprofilefs_create_ro_atomic(dir, "bt_lost_no_mapping",
+		&oprofile_stats.bt_lost_no_mapping);
+#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
+	oprofilefs_create_ro_atomic(dir, "multiplex_counter",
+		&oprofile_stats.multiplex_counter);
+#endif
+}