From 739421ac52472d8dd2f23c141d449ff112fbf9b6 Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Tue, 30 Sep 2014 09:08:44 +0200
Subject: kern: reduce the size of `struct thread'

Reduce the size of `struct thread' by twelve bytes making it fit into
exactly five cache lines (on 32-bit platforms).

* kern/thread.h (struct thread): Group the state and all flags in a
bitfield.
(TH_EV_WAKE_ACTIVE, TH_EV_STATE): Provide macros that generate keys
for synchronization primitives like `thread_wakeup'.
* kern/thread.c (thread_halt, thread_dowait, thread_suspend): Use the
new keys instead of addresses of fields for the synchronisation.
* kern/ipc_sched.c (thread_handoff): Likewise.
* kern/sched_prim.c (thread_invoke, thread_dispatch): Likewise.
---
 kern/ipc_sched.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'kern/ipc_sched.c')

diff --git a/kern/ipc_sched.c b/kern/ipc_sched.c
index cc1672d6..be82971b 100644
--- a/kern/ipc_sched.c
+++ b/kern/ipc_sched.c
@@ -268,7 +268,7 @@ thread_handoff(
 			 */
 			old->wake_active = FALSE;
 			thread_unlock(old);
-			thread_wakeup((event_t)&old->wake_active);
+			thread_wakeup(TH_EV_WAKE_ACTIVE(old));
 			goto after_old_thread;
 		}
 	} else
-- 
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