1 #define _GNU_SOURCE 2 #include <fcntl.h> 3 #include "syscall.h" 4 readahead(int fd,off_t pos,size_t len)5 ssize_t readahead(int fd, off_t pos, size_t len) 6 { 7 return syscall(SYS_readahead, fd, __SYSCALL_LL_O(pos), len); 8 } 9