diff options
| author | Paul Gortmaker <paul.gortmaker@windriver.com> | 2013-08-27 18:20:26 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-02-13 22:21:13 (GMT) |
| commit | c8d506dea6b3417d35668818c1476b5080a42670 (patch) | |
| tree | 9ae36c9a69d2fb44cb81db105123cd8081c90b66 /kernel | |
| parent | f2e61f38c65d5551e72d06329e1c9e951261c12c (diff) | |
| download | linux-fsl-qoriq-c8d506dea6b3417d35668818c1476b5080a42670.tar.xz | |
simple-wait: rename and export the equivalent of waitqueue_active()
The function "swait_head_has_waiters()" was internalized into
wait-simple.c but it parallels the waitqueue_active of normal
waitqueue support. Given that there are over 150 waitqueue_active
users in drivers/ fs/ kernel/ and the like, lets make it globally
visible, and rename it to parallel the waitqueue_active accordingly.
We'll need to do this if we expect to expand its usage beyond RT.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/wait-simple.c | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/kernel/wait-simple.c b/kernel/wait-simple.c index 2c85626..7dfa86d 100644 --- a/kernel/wait-simple.c +++ b/kernel/wait-simple.c @@ -26,14 +26,6 @@ static inline void __swait_dequeue(struct swaiter *w) list_del_init(&w->node); } -/* Check whether a head has waiters enqueued */ -static inline bool swait_head_has_waiters(struct swait_head *h) -{ - /* Make sure the condition is visible before checking list_empty() */ - smp_mb(); - return !list_empty(&h->list); -} - void __init_swait_head(struct swait_head *head, struct lock_class_key *key) { raw_spin_lock_init(&head->lock); @@ -112,7 +104,7 @@ __swait_wake(struct swait_head *head, unsigned int state, unsigned int num) unsigned long flags; int woken; - if (!swait_head_has_waiters(head)) + if (!swaitqueue_active(head)) return 0; raw_spin_lock_irqsave(&head->lock, flags); |