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The C and C++ Include Header Files

cat -n /usr/include/linux/rpmsg_types.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _LINUX_RPMSG_TYPES_H
     3	#define _LINUX_RPMSG_TYPES_H
     4	
     5	#include <linux/types.h>
     6	
     7	typedef __u16 __bitwise __rpmsg16;
     8	typedef __u32 __bitwise __rpmsg32;
     9	typedef __u64 __bitwise __rpmsg64;
    10	
    11	#endif /* _LINUX_RPMSG_TYPES_H */