io_uring: make io_read/write return an integer
The callers all convert to an integer, and we only return 0/-ERROR
anyway.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The callers all convert to an integer, and we only return 0/-ERROR
anyway.
Signed-off-by: Jens Axboe <axboe@kernel.dk>