diff -urb linux/kernel/signal.c linux-sig/kernel/signal.c
--- linux/kernel/signal.c	Wed Jan  3 20:45:26 2001
+++ linux-sig/kernel/signal.c	Wed Apr  4 03:10:44 2001
@@ -606,6 +606,35 @@
 }
  /*
+ * kill_posix_vm_info() send a signal to a thread which isn't blocking the signal
+ * and which is executing in the current process. This is what is used
+ * to get POSIX signal semantics.
+ */
+
+int kill_posix_vm_info(int sig, struct siginfo *info, struct mm_struct* vm_ptr) {
+	int retval = -EINVAL;
+	if (vm_ptr != NULL) {
+		struct task_struct *p;
+
+		retval = -ESRCH;
+		read_lock(&tasklist_lock);
+		for_each_task(p) {
+			if (p->mm == vm_ptr) {
+				if (!sigismember(&(p->blocked), sig)) {
+					int err = send_sig_info(sig, info, p);
+
+					if (retval)
+						retval = err;
+					break;
+				}
+			}
+		}
+		read_unlock(&tasklist_lock);
+	}
+	return retval;
+}
+
+/*
  * kill_sl_info() sends a signal to the session leader: this is used
  * to send SIGHUP to the controlling process of a terminal when
  * the connection is lost.
diff -urb linux/mm/filemap.c linux-sig/mm/filemap.c
--- linux/mm/filemap.c	Wed Apr  4 02:59:10 2001
+++ linux-sig/mm/filemap.c	Wed Apr  4 02:49:47 2001
@@ -1544,7 +1544,10 @@
 		sinfo.si_code = SI_ASYNCIO;
 		sinfo.si_value = sigev->sigev_value;
 -		send_sig_info(sigev->sigev_signo, &sinfo, task);
+#ifdef AIO_DEBUG
+		printk("Sending signal to mm %x of process %d\n", task->mm, task->pid);
+#endif
+		kill_posix_vm_info(sigev->sigev_signo, &sinfo, task->mm);
 	}
 }
 @@ -2178,7 +2181,7 @@
 		 */
 		if (!page_cache) {
 			spin_unlock(&pagecache_lock);
-			page_cache = page_cache_alloc();
+			page_cache = page_cache_alloc(NULL);
 			/*
 			 * That could have slept, so go around to the
 			 * very beginning..