add 4 io

hc

2023-08-21 ef9e1ccebba20d2e3859126411166909a383f483

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __UM_SMP_H
#define __UM_SMP_H
 
#define hard_smp_processor_id()        0
 
#endif