Linus Torvalds writes: (Summary)
*/
-static void __wake_up_common(struct wait_queue_head *wq_head, unsigned int mode,
- int nr_exclusive, int wake_flags, void *key)
+static int __wake_up_common(struct wait_queue_head *wq_head, unsigned int mode,
+ int nr_exclusive, int wake_flags, void *key,
+ wait_queue_entry_t *bookmark)
{
wait_queue_entry_t *curr, *next; WQ_FLAG_BOOKMARK) {
+ /*
+ * Take a breather from holding the lock,
+ * allow pages that finish wake up asynchronously
+ * to acquire the lock and remove themselves
+ * from wait queue
+ */
+ spin_unlock_irqrestore(&q->lock, flags);
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