- Update to 2.6.25-rc3.

[linux-flexiantxendom0-3.2.10.git] / include / linux / wait.h

diff --git a/include/linux/wait.h b/include/linux/wait.h
index 8eb6420..0081147 100644 (file)
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -117,9 +117,9 @@ static inline int waitqueue_active(wait_queue_head_t *q)
  */
 #define is_sync_wait(wait)     (!(wait) || ((wait)->private))
 
-extern void FASTCALL(add_wait_queue(wait_queue_head_t *q, wait_queue_t * wait));
-extern void FASTCALL(add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t * wait));
-extern void FASTCALL(remove_wait_queue(wait_queue_head_t *q, wait_queue_t * wait));
+extern void add_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
+extern void add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait);
+extern void remove_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
 
 static inline void __add_wait_queue(wait_queue_head_t *head, wait_queue_t *new)
 {
@@ -141,25 +141,26 @@ static inline void __remove_wait_queue(wait_queue_head_t *head,
        list_del(&old->task_list);
 }
 
-void FASTCALL(__wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key));
-extern void FASTCALL(__wake_up_locked(wait_queue_head_t *q, unsigned int mode));
-extern void FASTCALL(__wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr));
-void FASTCALL(__wake_up_bit(wait_queue_head_t *, void *, int));
-int FASTCALL(__wait_on_bit(wait_queue_head_t *, struct wait_bit_queue *, int (*)(void *), unsigned));
-int FASTCALL(__wait_on_bit_lock(wait_queue_head_t *, struct wait_bit_queue *, int (*)(void *), unsigned));
-void FASTCALL(wake_up_bit(void *, int));
-int FASTCALL(out_of_line_wait_on_bit(void *, int, int (*)(void *), unsigned));
-int FASTCALL(out_of_line_wait_on_bit_lock(void *, int, int (*)(void *), unsigned));
-wait_queue_head_t *FASTCALL(bit_waitqueue(void *, int));
-
-#define wake_up(x)                     __wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 1, NULL)
-#define wake_up_nr(x, nr)              __wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, nr, NULL)
-#define wake_up_all(x)                 __wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 0, NULL)
+void __wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key);
+extern void __wake_up_locked(wait_queue_head_t *q, unsigned int mode);
+extern void __wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr);
+void __wake_up_bit(wait_queue_head_t *, void *, int);
+int __wait_on_bit(wait_queue_head_t *, struct wait_bit_queue *, int (*)(void *), unsigned);
+int __wait_on_bit_lock(wait_queue_head_t *, struct wait_bit_queue *, int (*)(void *), unsigned);
+void wake_up_bit(void *, int);
+int out_of_line_wait_on_bit(void *, int, int (*)(void *), unsigned);
+int out_of_line_wait_on_bit_lock(void *, int, int (*)(void *), unsigned);
+wait_queue_head_t *bit_waitqueue(void *, int);
+
+#define wake_up(x)                     __wake_up(x, TASK_NORMAL, 1, NULL)
+#define wake_up_nr(x, nr)              __wake_up(x, TASK_NORMAL, nr, NULL)
+#define wake_up_all(x)                 __wake_up(x, TASK_NORMAL, 0, NULL)
+#define wake_up_locked(x)              __wake_up_locked((x), TASK_NORMAL)
+
 #define wake_up_interruptible(x)       __wake_up(x, TASK_INTERRUPTIBLE, 1, NULL)
 #define wake_up_interruptible_nr(x, nr)        __wake_up(x, TASK_INTERRUPTIBLE, nr, NULL)
 #define wake_up_interruptible_all(x)   __wake_up(x, TASK_INTERRUPTIBLE, 0, NULL)
-#define        wake_up_locked(x)               __wake_up_locked((x), TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE)
-#define wake_up_interruptible_sync(x)   __wake_up_sync((x),TASK_INTERRUPTIBLE, 1)
+#define wake_up_interruptible_sync(x)  __wake_up_sync((x), TASK_INTERRUPTIBLE, 1)
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 /*
@@ -361,6 +362,47 @@ do {                                                                       \
        __ret;                                                          \
 })
 
+#define __wait_event_killable(wq, condition, ret)                      \
+do {                                                                   \
+       DEFINE_WAIT(__wait);                                            \
+                                                                       \
+       for (;;) {                                                      \
+               prepare_to_wait(&wq, &__wait, TASK_KILLABLE);           \
+               if (condition)                                          \
+                       break;                                          \
+               if (!fatal_signal_pending(current)) {                   \
+                       schedule();                                     \
+                       continue;                                       \
+               }                                                       \
+               ret = -ERESTARTSYS;                                     \
+               break;                                                  \
+       }                                                               \
+       finish_wait(&wq, &__wait);                                      \
+} while (0)
+
+/**
+ * wait_event_killable - sleep until a condition gets true
+ * @wq: the waitqueue to wait on
+ * @condition: a C expression for the event to wait for
+ *
+ * The process is put to sleep (TASK_KILLABLE) until the
+ * @condition evaluates to true or a signal is received.
+ * The @condition is checked each time the waitqueue @wq is woken up.
+ *
+ * wake_up() has to be called after changing any variable that could
+ * change the result of the wait condition.
+ *
+ * The function will return -ERESTARTSYS if it was interrupted by a
+ * signal and 0 if @condition evaluated to true.
+ */
+#define wait_event_killable(wq, condition)                             \
+({                                                                     \
+       int __ret = 0;                                                  \
+       if (!(condition))                                               \
+               __wait_event_killable(wq, condition, __ret);            \
+       __ret;                                                          \
+})
+
 /*
  * Must be called with the spinlock in the wait_queue_head_t held.
  */
@@ -395,11 +437,9 @@ extern long interruptible_sleep_on_timeout(wait_queue_head_t *q,
 /*
  * Waitqueues which are removed from the waitqueue_head at wakeup time
  */
-void FASTCALL(prepare_to_wait(wait_queue_head_t *q,
-                               wait_queue_t *wait, int state));
-void FASTCALL(prepare_to_wait_exclusive(wait_queue_head_t *q,
-                               wait_queue_t *wait, int state));
-void FASTCALL(finish_wait(wait_queue_head_t *q, wait_queue_t *wait));
+void prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state);
+void prepare_to_wait_exclusive(wait_queue_head_t *q, wait_queue_t *wait, int state);
+void finish_wait(wait_queue_head_t *q, wait_queue_t *wait);
 int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
 int wake_bit_function(wait_queue_t *wait, unsigned mode, int sync, void *key);