--- linux-user/syscall.c.orig	2006-11-05 07:07:19.000000000 +0200
+++ linux-user/syscall.c	2006-11-05 07:07:25.000000000 +0200
@@ -3947,7 +3956,8 @@ long do_syscall(void *cpu_env, int num, 
         ret = get_errno(gettid());
         break;
     case TARGET_NR_readahead:
-        goto unimplemented;
+        ret = get_errno(readahead((int)arg1, (off64_t)arg2, (size_t)arg3));
+        break;
 #ifdef TARGET_NR_setxattr
     case TARGET_NR_setxattr:
     case TARGET_NR_lsetxattr: