Re: poll: allow f_op->poll to sleep, take #3

[Tejun Heo <htejun@gmail.com>]

Davide Libenzi wrote:
> On Sun, 23 Nov 2008, Tejun Heo wrote:
> 
>> +static int pollwake(wait_queue_t *wait, unsigned mode, int sync, void *key)
>> +{
>> +	struct poll_wqueues *pwq = wait->private;
>> +	DECLARE_WAITQUEUE(dummy_wait, pwq->polling_task);
>> +
>> +	set_mb(pwq->triggered, 1);
>> +
>> +	/* perform the default wake up operation */
>> +	return default_wake_function(&dummy_wait, mode, sync, key);
>> +}
> 
> Wouldn't it be nicer to un-static try_to_wake_up() (or a wrapper) instead 
> of setting up a fake wait queue just to use default_wake_function(), just 
> to wake up a task?

I thought try_to_wake_up() was made static to avoid abuse but then again
creating dummy waitqueue is an obvious abuse of waitqueue.  What do
other people think?  I'll be happy to use try_to_wake_up() directly.

Thanks.

-- 
tejun