Oprofile Multiplexing Patch

[pandora-kernel.git] / drivers / oprofile / oprofile_files.c

diff --git a/drivers/oprofile/oprofile_files.c b/drivers/oprofile/oprofile_files.c
index ef953ba..cc4f5a1 100644 (file)
--- a/drivers/oprofile/oprofile_files.c
+++ b/drivers/oprofile/oprofile_files.c
@@ -9,6 +9,7 @@
 
 #include <linux/fs.h>
 #include <linux/oprofile.h>
+#include <linux/jiffies.h>
 
 #include "event_buffer.h"
 #include "oprofile_stats.h"
@@ -18,6 +19,40 @@ unsigned long fs_buffer_size = 131072;
 unsigned long fs_cpu_buffer_size = 8192;
 unsigned long fs_buffer_watershed = 32768; /* FIXME: tune */
 
+static ssize_t timeout_read(struct file *file, char __user *buf,
+               size_t count, loff_t *offset)
+{
+       return oprofilefs_ulong_to_user(jiffies_to_msecs(timeout_jiffies),
+                               buf, count, offset);
+}
+
+
+static ssize_t timeout_write(struct file *file, char const __user *buf,
+               size_t count, loff_t *offset)
+{
+       unsigned long val;
+       int retval;
+
+       if (*offset)
+               return -EINVAL;
+
+       retval = oprofilefs_ulong_from_user(&val, buf, count);
+       if (retval)
+               return retval;
+
+       retval = oprofile_set_timeout(val);
+
+       if (retval)
+               return retval;
+       return count;
+}
+
+static const struct file_operations timeout_fops = {
+       .read           = timeout_read,
+       .write          = timeout_write,
+};
+
+
 static ssize_t depth_read(struct file * file, char __user * buf, size_t count, loff_t * offset)
 {
        return oprofilefs_ulong_to_user(backtrace_depth, buf, count, offset);
@@ -85,11 +120,10 @@ static ssize_t enable_write(struct file * file, char const __user * buf, size_t
 
        if (*offset)
                return -EINVAL;
-
        retval = oprofilefs_ulong_from_user(&val, buf, count);
        if (retval)
                return retval;
- 
+
        if (val)
                retval = oprofile_start();
        else
@@ -129,6 +163,7 @@ void oprofile_create_files(struct super_block * sb, struct dentry * root)
        oprofilefs_create_file(sb, root, "cpu_type", &cpu_type_fops); 
        oprofilefs_create_file(sb, root, "backtrace_depth", &depth_fops);
        oprofilefs_create_file(sb, root, "pointer_size", &pointer_size_fops);
+       oprofilefs_create_file(sb, root, "timeout_ms", &timeout_fops);
        oprofile_create_stats_files(sb, root);
        if (oprofile_ops.create_files)
                oprofile_ops.create_files(sb, root);