This is xnu-11215.1.10. See this file in:
/*
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 * This file contains Original Code and/or Modifications of Original Code
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/*
 * @OSF_COPYRIGHT@
 */
/*
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
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 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
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 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 */

/*
 *	File:	kern_return.h
 *	Author:	Avadis Tevanian, Jr., Michael Wayne Young
 *	Date:	1985
 *
 *	Machine-dependent kernel return definitions.
 */

#ifndef _MACH_ARM_KERN_RETURN_H_
#define _MACH_ARM_KERN_RETURN_H_

#if defined (__arm__) || defined (__arm64__)

#ifndef ASSEMBLER
typedef int             kern_return_t;
#endif  /* ASSEMBLER */

#endif /* defined (__arm__) || defined (__arm64__) */

#endif  /* _MACH_ARM_KERN_RETURN_H_ */