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The C and C++ Include Header Files

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

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef __LINUX_ARCFB_H__
     3	#define __LINUX_ARCFB_H__
     4	
     5	#define FBIO_WAITEVENT		_IO('F', 0x88)
     6	#define FBIO_GETCONTROL2	_IOR('F', 0x89, size_t)
     7	
     8	#endif
     9