+#ifdef CONFIG_PROFILING
+static ssize_t profiling_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", prof_on);
+}
+static ssize_t profiling_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+
+ if (prof_on)
+ return -EEXIST;
+ /*
+ * This eventually calls into get_option() which
+ * has a ton of callers and is not const. It is
+ * easiest to cast it away here.
+ */
+ profile_setup((char *)buf);
+ ret = profile_init();
+ if (ret)
+ return ret;
+ ret = create_proc_profile();
+ if (ret)
+ return ret;
+ return count;
+}
+KERNEL_ATTR_RW(profiling);
+#endif
+