--- kernel/acct.c.0	2006-03-20 14:53:29.000000000 +0900
+++ kernel/acct.c	2008-08-10 11:04:43.000000000 +0900
@@ -56,6 +56,7 @@
 #include <linux/times.h>
 #include <linux/syscalls.h>
 #include <linux/mount.h>
+#include <linux/proc_fs.h>
 #include <asm/uaccess.h>
 #include <asm/div64.h>
 #include <linux/blkdev.h> /* sector_div */
@@ -605,3 +606,39 @@ void acct_clear_integrals(struct task_st
 		tsk->acct_vm_mem1 = 0;
 	}
 }
+
+#ifdef CONFIG_PROC_FS
+static int acct_read_proc(char *page, char **start, off_t off, int count,
+	int *eof, void *data)
+{
+	int ret;
+
+	spin_lock(&acct_globals.lock);
+	if(acct_globals.file) {
+		ret = sprintf(page, "on %s %s\n",
+			acct_globals.active ? "active":"paused",
+			acct_globals.file->f_dentry->d_name.name);
+	} else {
+		ret = sprintf(page, "off\n");
+	}
+	spin_unlock(&acct_globals.lock);
+
+	*eof = (ret < off+count) ? 1:0;
+	*start = page + off;
+	ret -= off;
+	if(ret > count) {
+		ret = count;
+	}
+	if(ret < 0) {
+		ret = 0;
+	}
+	return ret;
+}
+
+static int __init acct_proc_init(void)
+{
+	create_proc_read_entry("acct", S_IRUGO, NULL, acct_read_proc, NULL);
+	return 0;
+}
+__initcall(acct_proc_init);
+#endif