1 files changed, 74 insertions, 0 deletions

diff --git a/drivers/oprofile/oprofile_stats.c b/drivers/oprofile/oprofile_stats.c
new file mode 100644
index 000000000000..e94b1e4a2a84
--- /dev/null
+++ b/drivers/oprofile/oprofile_stats.c
@@ -0,0 +1,74 @@
+/**
+ * @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_cpu(i) {
+                cpu_buf = &cpu_buffer[i]; 
+                cpu_buf->sample_received = 0;
+                cpu_buf->sample_lost_overflow = 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);
+}
+
+
+void oprofile_create_stats_files(struct super_block * sb, struct dentry * root)
+{
+        struct oprofile_cpu_buffer * cpu_buf;
+        struct dentry * cpudir;
+        struct dentry * dir;
+        char buf[10];
+        int i;
+
+        dir = oprofilefs_mkdir(sb, root, "stats");
+        if (!dir)
+                return;
+
+        for_each_cpu(i) {
+                cpu_buf = &cpu_buffer[i]; 
+                snprintf(buf, 10, "cpu%d", i);
+                cpudir = oprofilefs_mkdir(sb, 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(sb, cpudir, "sample_received",
+                        &cpu_buf->sample_received);
+                oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow",
+                        &cpu_buf->sample_lost_overflow);
+                oprofilefs_create_ro_ulong(sb, cpudir, "backtrace_aborted",
+                        &cpu_buf->backtrace_aborted);
+        }
+ 
+        oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm",
+                &oprofile_stats.sample_lost_no_mm);
+        oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping",
+                &oprofile_stats.sample_lost_no_mapping);
+        oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow",
+                &oprofile_stats.event_lost_overflow);
+        oprofilefs_create_ro_atomic(sb, dir, "bt_lost_no_mapping",
+                &oprofile_stats.bt_lost_no_mapping);
+}