task_pgrp_vnr
atomic_set(&dev_priv->mksstat_user_pids[slot], task_pgrp_vnr(current));
pgid = task_pgrp_vnr(current);
prstatus->pr_pgrp = task_pgrp_vnr(p);
psinfo->pr_pgrp = task_pgrp_vnr(p);
prstatus->pr_pgrp = task_pgrp_vnr(p);
psinfo->pr_pgrp = task_pgrp_vnr(p);