GP_REGS_SIZE
unsafe_copy_to_user(&frame->mc_gregs, regs, GP_REGS_SIZE, failed);
GP_REGS_SIZE - PT_ORIG_R3 * sizeof(elf_greg_t), failed);
unsafe_copy_to_user(&sc->gp_regs, regs, GP_REGS_SIZE, efault_out);
err |= __copy_to_user(&tm_sc->gp_regs, regs, GP_REGS_SIZE);
&tsk->thread.ckpt_regs, GP_REGS_SIZE);