diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/wait.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/wait.c b/kernel/wait.c index 923a47e7c027..78256a812ca0 100644 --- a/kernel/wait.c +++ b/kernel/wait.c @@ -127,3 +127,26 @@ int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void * return ret; } EXPORT_SYMBOL(autoremove_wake_function); + +int wake_bit_function(wait_queue_t *wait, unsigned mode, int sync, void *arg) +{ + struct wait_bit_key *key = arg; + struct wait_bit_queue *wait_bit + = container_of(wait, struct wait_bit_queue, wait); + + if (wait_bit->key.flags != key->flags || + wait_bit->key.bit_nr != key->bit_nr || + test_bit(key->bit_nr, key->flags)) + return 0; + else + return autoremove_wake_function(wait, mode, sync, key); +} +EXPORT_SYMBOL(wake_bit_function); + +void fastcall __wake_up_bit(wait_queue_head_t *wq, void *word, int bit) +{ + struct wait_bit_key key = __WAIT_BIT_KEY_INITIALIZER(word, bit); + if (waitqueue_active(wq)) + __wake_up(wq, TASK_INTERRUPTIBLE|TASK_UNINTERRUPTIBLE, 1, &key); +} +EXPORT_SYMBOL(__wake_up_bit); |