fadvise.h

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#ifndef FADVISE_H_INCLUDED
#define FADVISE_H_INCLUDED

#define POSIX_FADV_NORMAL   0 /* No further special treatment.  */
#define POSIX_FADV_RANDOM   1 /* Expect random page references.  */
#define POSIX_FADV_SEQUENTIAL   2 /* Expect sequential page references.  */
#define POSIX_FADV_WILLNEED 3 /* Will need these pages.  */

/*
 * The advise values for POSIX_FADV_DONTNEED and POSIX_ADV_NOREUSE
 * for s390-64 differ from the values for the rest of the world.
 */
#if defined(__s390x__)
#define POSIX_FADV_DONTNEED 6 /* Don't need these pages.  */
#define POSIX_FADV_NOREUSE  7 /* Data will be accessed once.  */
#else
#define POSIX_FADV_DONTNEED 4 /* Don't need these pages.  */
#define POSIX_FADV_NOREUSE  5 /* Data will be accessed once.  */
#endif

#endif  /* FADVISE_H_INCLUDED */