* All scheduler implementations:

- enqueue_in_run_queue() no longer returns whether rescheduling is supposed
    to happen. Instead is sets cpu_ent::invoke_scheduler on the current CPU.
  - reschedule() does now handle cpu_ent::invoke_scheduler_if_idle(). No need
    to let all callers do that.
* thread_unblock[_locked]() no longer return whether rescheduling is supposed
  to happen.
* Got rid of the B_INVOKE_SCHEDULER handling. The interrupt hooks really
  can't know, when it makes sense to reschedule or not.
* Introduced scheduler_reschedule_if_necessary[_locked]() functions for
  checking+invoking the scheduler.
* Some semaphore functions (e.g. delete_sem()) invoke the scheduler now, if
  they wake up anything with greater priority.
  I've also tried to add scheduler invocations in the condition variable and
  mutex/rw_lock code, but that actually has a negative impact on performance,
  probably because it causes too much ping-ponging between threads when
  multiple locking primitives are involved.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34657 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/fs/fifo.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2007-2008, Ingo Weinhold, [email protected].
+ * Copyright 2007-2009, Ingo Weinhold, [email protected].
  * Copyright 2003-2009, Axel Dörfler, [email protected].
  * Distributed under the terms of the MIT License.
  */