sched: clean up sleep_on() APIs

clean up the sleep_on() APIs:

 - do not use fastcall
 - replace fragile macro magic with proper inline functions

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/include/linux/wait.h b/include/linux/wait.h
index e820d00..0e68628 100644 (file)
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -366,15 +366,15 @@ static inline void remove_wait_queue_locked(wait_queue_head_t *q,
 
 /*
  * These are the old interfaces to sleep waiting for an event.
- * They are racy.  DO NOT use them, use the wait_event* interfaces above.  
- * We plan to remove these interfaces during 2.7.
+ * They are racy.  DO NOT use them, use the wait_event* interfaces above.
+ * We plan to remove these interfaces.
  */
-extern void FASTCALL(sleep_on(wait_queue_head_t *q));
-extern long FASTCALL(sleep_on_timeout(wait_queue_head_t *q,
-                                     signed long timeout));
-extern void FASTCALL(interruptible_sleep_on(wait_queue_head_t *q));
-extern long FASTCALL(interruptible_sleep_on_timeout(wait_queue_head_t *q,
-                                                   signed long timeout));
+extern void sleep_on(wait_queue_head_t *q);
+extern long sleep_on_timeout(wait_queue_head_t *q,
+                                     signed long timeout);
+extern void interruptible_sleep_on(wait_queue_head_t *q);
+extern long interruptible_sleep_on_timeout(wait_queue_head_t *q,
+                                          signed long timeout);
 
 /*
  * Waitqueues which are removed from the waitqueue_head at wakeup time

diff --git a/kernel/sched.c b/kernel/sched.c
index ef6b6bb..0e3caf7 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3699,74 +3699,85 @@ out:
 }
 EXPORT_SYMBOL(wait_for_completion_interruptible_timeout);
 
-
-#define        SLEEP_ON_VAR                                    \
-       unsigned long flags;                            \
-       wait_queue_t wait;                              \
-       init_waitqueue_entry(&wait, current);
-
-#define SLEEP_ON_HEAD                                  \
-       spin_lock_irqsave(&q->lock,flags);              \
-       __add_wait_queue(q, &wait);                     \
+static inline void
+sleep_on_head(wait_queue_head_t *q, wait_queue_t *wait, unsigned long *flags)
+{
+       spin_lock_irqsave(&q->lock, *flags);
+       __add_wait_queue(q, wait);
        spin_unlock(&q->lock);
+}
 
-#define        SLEEP_ON_TAIL                                   \
-       spin_lock_irq(&q->lock);                        \
-       __remove_wait_queue(q, &wait);                  \
-       spin_unlock_irqrestore(&q->lock, flags);
+static inline void
+sleep_on_tail(wait_queue_head_t *q, wait_queue_t *wait, unsigned long *flags)
+{
+       spin_lock_irq(&q->lock);
+       __remove_wait_queue(q, wait);
+       spin_unlock_irqrestore(&q->lock, *flags);
+}
 
-void fastcall __sched interruptible_sleep_on(wait_queue_head_t *q)
+void __sched interruptible_sleep_on(wait_queue_head_t *q)
 {
-       SLEEP_ON_VAR
+       unsigned long flags;
+       wait_queue_t wait;
+
+       init_waitqueue_entry(&wait, current);
 
        current->state = TASK_INTERRUPTIBLE;
 
-       SLEEP_ON_HEAD
+       sleep_on_head(q, &wait, &flags);
        schedule();
-       SLEEP_ON_TAIL
+       sleep_on_tail(q, &wait, &flags);
 }
 EXPORT_SYMBOL(interruptible_sleep_on);
 
-long fastcall __sched
+long __sched
 interruptible_sleep_on_timeout(wait_queue_head_t *q, long timeout)
 {
-       SLEEP_ON_VAR
+       unsigned long flags;
+       wait_queue_t wait;
+
+       init_waitqueue_entry(&wait, current);
 
        current->state = TASK_INTERRUPTIBLE;
 
-       SLEEP_ON_HEAD
+       sleep_on_head(q, &wait, &flags);
        timeout = schedule_timeout(timeout);
-       SLEEP_ON_TAIL
+       sleep_on_tail(q, &wait, &flags);
 
        return timeout;
 }
 EXPORT_SYMBOL(interruptible_sleep_on_timeout);
 
-void fastcall __sched sleep_on(wait_queue_head_t *q)
+void __sched sleep_on(wait_queue_head_t *q)
 {
-       SLEEP_ON_VAR
+       unsigned long flags;
+       wait_queue_t wait;
+
+       init_waitqueue_entry(&wait, current);
 
        current->state = TASK_UNINTERRUPTIBLE;
 
-       SLEEP_ON_HEAD
+       sleep_on_head(q, &wait, &flags);
        schedule();
-       SLEEP_ON_TAIL
+       sleep_on_tail(q, &wait, &flags);
 }
 EXPORT_SYMBOL(sleep_on);
 
-long fastcall __sched sleep_on_timeout(wait_queue_head_t *q, long timeout)
+long __sched sleep_on_timeout(wait_queue_head_t *q, long timeout)
 {
-       SLEEP_ON_VAR
+       unsigned long flags;
+       wait_queue_t wait;
+
+       init_waitqueue_entry(&wait, current);
 
        current->state = TASK_UNINTERRUPTIBLE;
 
-       SLEEP_ON_HEAD
+       sleep_on_head(q, &wait, &flags);
        timeout = schedule_timeout(timeout);
-       SLEEP_ON_TAIL
+       sleep_on_tail(q, &wait, &flags);
 
        return timeout;
 }
-
 EXPORT_SYMBOL(sleep_on_timeout);
 
 #ifdef CONFIG_RT_MUTEXES