The C and C++ Include Header Files

/usr/include/linux/fadvise.h


$ cat -n /usr/include/linux/fadvise.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef FADVISE_H_INCLUDED
     3	#define FADVISE_H_INCLUDED
     4	
     5	#define POSIX_FADV_NORMAL	0 /* No further special treatment.  */
     6	#define POSIX_FADV_RANDOM	1 /* Expect random page references.  */
     7	#define POSIX_FADV_SEQUENTIAL	2 /* Expect sequential page references.  */
     8	#define POSIX_FADV_WILLNEED	3 /* Will need these pages.  */
     9	
    10	/*
    11	 * The advise values for POSIX_FADV_DONTNEED and POSIX_ADV_NOREUSE
    12	 * for s390-64 differ from the values for the rest of the world.
    13	 */
    14	#if defined(__s390x__)
    15	#define POSIX_FADV_DONTNEED	6 /* Don't need these pages.  */
    16	#define POSIX_FADV_NOREUSE	7 /* Data will be accessed once.  */
    17	#else
    18	#define POSIX_FADV_DONTNEED	4 /* Don't need these pages.  */
    19	#define POSIX_FADV_NOREUSE	5 /* Data will be accessed once.  */
    20	#endif
    21	
    22	#endif	/* FADVISE_H_INCLUDED */