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io_uring/io-wq: forward submission ref to async

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First it changes io-wq interfaces. It replaces {get,put}_work() with
free_work(), which guaranteed to be called exactly once. It also enforces
free_work() callback to be non-NULL.

io_uring follows the changes and instead of putting a submission reference
in io_put_req_async_completion(), it will be done in io_free_work(). As
removes io_get_work() with corresponding refcount_inc(), the ref balance
is maintained.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov
2020-03-04 16:14:12 +03:00
committed by Jens Axboe
parent f462fd36fc
commit e9fd939654
3 changed files with 27 additions and 39 deletions
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6
fs/io-wq.h
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@@ -81,14 +81,12 @@ struct io_wq_work {
*(work) = (struct io_wq_work){ .func = _func }; \
} while (0) \
typedef void (get_work_fn)(struct io_wq_work *);
typedef void (put_work_fn)(struct io_wq_work *);
typedef void (free_work_fn)(struct io_wq_work *);
struct io_wq_data {
struct user_struct *user;
get_work_fn *get_work;
put_work_fn *put_work;
free_work_fn *free_work;
};
struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data);