-//ust// mutex_lock(¤t->group_leader->user_markers_mutex);
-//ust// hlist_add_head(&umark->hlist,
-//ust// ¤t->group_leader->user_markers);
-//ust// current->group_leader->user_markers_sequence++;
-//ust// mutex_unlock(¤t->group_leader->user_markers_mutex);
-//ust// mutex_unlock(&markers_mutex);
-//ust// } else {
-//ust// mutex_lock(¤t->group_leader->user_markers_mutex);
-//ust// free_user_marker(state,
-//ust// ¤t->group_leader->user_markers);
-//ust// current->group_leader->user_markers_sequence++;
-//ust// mutex_unlock(¤t->group_leader->user_markers_mutex);
-//ust// }
-//ust// goto end;
-//ust// error_unlock:
-//ust// mutex_unlock(&markers_mutex);
-//ust// error:
-//ust// kfree(umark);
-//ust// end:
-//ust// return ret;
-//ust// }
-//ust//
-//ust// /*
-//ust// * Types :
-//ust// * string : 0
-//ust// */
-//ust// asmlinkage long sys_trace(int type, uint16_t id,
-//ust// char __user *ubuf)
-//ust// {
-//ust// long ret = -EPERM;
-//ust// char *page;
-//ust// int len;
-//ust//
-//ust// switch (type) {
-//ust// case 0: /* String */
-//ust// ret = -ENOMEM;
-//ust// page = (char *)__get_free_page(GFP_TEMPORARY);
-//ust// if (!page)
-//ust// goto string_out;
-//ust// len = strncpy_from_user(page, ubuf, PAGE_SIZE);
-//ust// if (len < 0) {
-//ust// ret = -EFAULT;
-//ust// goto string_err;
-//ust// }
-//ust// trace_mark(userspace, string, "string %s", page);
-//ust// string_err:
-//ust// free_page((unsigned long) page);
-//ust// string_out:
-//ust// break;
-//ust// default:
-//ust// break;
-//ust// }
-//ust// return ret;
-//ust// }
-
-//ust// static void marker_update_processes(void)
-//ust// {
-//ust// struct task_struct *g, *t;
-//ust//
-//ust// /*
-//ust// * markers_mutex is taken to protect the p->user_markers read.
-//ust// */
-//ust// mutex_lock(&markers_mutex);
-//ust// read_lock(&tasklist_lock);
-//ust// for_each_process(g) {
-//ust// WARN_ON(!thread_group_leader(g));
-//ust// if (hlist_empty(&g->user_markers))
-//ust// continue;
-//ust// if (strcmp(g->comm, "testprog") == 0)
-//ust// printk(KERN_DEBUG "set update pending for testprog\n");
-//ust// t = g;
-//ust// do {
-//ust// /* TODO : implement this thread flag in each arch. */
-//ust// set_tsk_thread_flag(t, TIF_MARKER_PENDING);
-//ust// } while ((t = next_thread(t)) != g);