Commit eba6f5a3 authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io-wq: allow grabbing existing io-wq 



Export a helper to attach to an existing io-wq, rather than setting up
a new one. This is doable now that we have reference counted io_wq's.

Reported-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent cccf0ee8

fs/io-wq.c

+8 −0
Original line number Diff line number Diff line
@@ -1114,6 +1114,14 @@ err: 
	return ERR_PTR(ret);

}



bool io_wq_get(struct io_wq *wq, struct io_wq_data *data)

{

	if (data->get_work != wq->get_work || data->put_work != wq->put_work)

		return false;



	return refcount_inc_not_zero(&wq->use_refs);

}



static bool io_wq_worker_wake(struct io_worker *worker, void *data)

{

	wake_up_process(worker->task);

fs/io-wq.h

+1 −0
Original line number Diff line number Diff line
@@ -99,6 +99,7 @@ struct io_wq_data { 
};



struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data);

bool io_wq_get(struct io_wq *wq, struct io_wq_data *data);

void io_wq_destroy(struct io_wq *wq);



void io_wq_enqueue(struct io_wq *wq, struct io_wq_work *work);

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