sys_readahead     819 include/linux/syscalls.h asmlinkage long sys_readahead(int fd, loff_t offset, size_t count);
sys_readahead     621 include/uapi/asm-generic/unistd.h __SC_COMP(__NR_readahead, sys_readahead, compat_sys_readahead)
sys_readahead     621 tools/include/uapi/asm-generic/unistd.h __SC_COMP(__NR_readahead, sys_readahead, compat_sys_readahead)