valid_user_regs
if (valid_user_regs(&newregs)) {
if (!valid_user_regs(&newregs))
err |= !valid_user_regs(regs);
ret |= !valid_user_regs(regs);
int valid_user_regs(struct user_pt_regs *regs, struct task_struct *task);
if (valid_user_regs(&newregs.user_regs, target))
if (!valid_user_regs(&newregs.user_regs, tsk))
if (!valid_user_regs(&newregs, target))
err |= !valid_user_regs(®s->user_regs, current);
ret |= !valid_user_regs(®s->user_regs, current);
err |= !valid_user_regs(®s->user_regs, current);