Kernel updates since December 2009

include/l4/generic/tcb.h

@@ -28,15 +28,20 @@
 #define TASK_INTERRUPTED		(1 << 0)
 #define TASK_SUSPENDING			(1 << 1)
 #define TASK_RESUMING			(1 << 2)
-#define TASK_EXITING			(1 << 3)
-#define TASK_PENDING_SIGNAL		(TASK_SUSPENDING | TASK_EXITING)
+#define TASK_PENDING_SIGNAL		(TASK_SUSPENDING)
+
+/*
+ * This is to indicate a task (either current or one of
+ * its children) exit has occured and cleanup needs to be
+ * called
+ */
+#define TASK_EXITED			(1 << 3)
 
 /* Task states */
 enum task_state {
 	TASK_INACTIVE	= 0,
 	TASK_SLEEPING	= 1,
 	TASK_RUNNABLE	= 2,
-	TASK_DEAD	= 3,
 };
 
 #define TASK_CID_MASK			0xFF000000
@@ -82,6 +87,9 @@ struct ktcb {
 	l4id_t tid;		/* Global thread id */
 	l4id_t tgid;		/* Global thread group id */
 
+	/* CPU affinity */
+	int affinity;
+
 	/* Other related threads */
 	l4id_t pagerid;
 
@@ -94,6 +102,9 @@ struct ktcb {
 	/* Lock for blocking thread state modifications via a syscall */
 	struct mutex thread_control_lock;
 
+	/* To protect against thread deletion/modification */
+	struct spinlock thread_lock;
+
 	u32 ts_need_resched;	/* Scheduling flag */
 	enum task_state state;
 
@@ -171,13 +182,14 @@ static inline void set_task_ids(struct ktcb *task, struct task_ids *ids)
 }
 
 struct ktcb *tcb_find(l4id_t tid);
+struct ktcb *tcb_find_lock(l4id_t tid);
 void tcb_add(struct ktcb *tcb);
 void tcb_remove(struct ktcb *tcb);
 
 void tcb_init(struct ktcb *tcb);
 struct ktcb *tcb_alloc_init(l4id_t cid);
 void tcb_delete(struct ktcb *tcb);
-
+void tcb_delete_zombies(void);
 
 void ktcb_list_remove(struct ktcb *task, struct ktcb_list *ktcb_list);
 void ktcb_list_add(struct ktcb *new, struct ktcb_list *ktcb_list);