UREG_I2
args.pidfd = compat_ptr(regs->u_regs[UREG_I2]);
args.parent_tid = compat_ptr(regs->u_regs[UREG_I2]);
args.pidfd = (int __user *)regs->u_regs[UREG_I2];
args.parent_tid = (int __user *)regs->u_regs[UREG_I2];
regs->u_regs[UREG_I1], regs->u_regs[UREG_I2],
regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
err |= __put_user(regs->u_regs[UREG_I2], &((*grp)[MC_O2]));
regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));
#define __PT_PARM3_REG u_regs[UREG_I2]