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The C and C++ Include Header Files

cat -n /usr/include/x86_64-linux-gnu/asm/msr.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _ASM_X86_MSR_H
     3	#define _ASM_X86_MSR_H
     4	
     5	#ifndef __ASSEMBLER__
     6	
     7	#include <linux/types.h>
     8	#include <linux/ioctl.h>
     9	
    10	#define X86_IOC_RDMSR_REGS	_IOWR('c', 0xA0, __u32[8])
    11	#define X86_IOC_WRMSR_REGS	_IOWR('c', 0xA1, __u32[8])
    12	
    13	#endif /* __ASSEMBLER__ */
    14	#endif /* _ASM_X86_MSR_H */