POSIX_FADV_DONTNEED
#define POSIX_FADV_DONTNEED 6 /* Don't need these pages. */
#define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
#define POSIX_FADV_DONTNEED 6 /* Don't need these pages. */
#define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */