bonefish+axeld:

* Implemented a tiny bit more sophisticated version of
  estimate_max_scheduling_latency() that uses a syscall that lets the scheduler
  decide.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36170 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/system/syscalls.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2009, Haiku Inc. All rights reserved.
+ * Copyright 2004-2010, Haiku Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  */
 #ifndef _SYSTEM_SYSCALLS_H
@@ -177,6 +177,8 @@ extern status_t		_kern_unblock_thread(thread_id thread, status_t status);
 extern status_t		_kern_unblock_threads(thread_id* threads, uint32 count,
 						status_t status);
 
+extern bigtime_t	_kern_estimate_max_scheduling_latency(thread_id thread);
+
 // user/group functions
 extern gid_t		_kern_getgid(bool effective);
 extern uid_t		_kern_getuid(bool effective);