On 9/8/21 1:10 PM, Pavel Begunkov wrote:
> Make read_iter_zero() to honor IOCB_NOWAIT, so /dev/zero can be
> advertised as FMODE_NOWAIT. It's useful for io_uring, which needs it to
> apply certain optimisations when doing I/O against the device.
>
> Set FMODE_NOWAIT for /dev/null as well, it never waits and therefore
> trivially meets the criteria.
Reviewed-by: Jens Axboe <[email protected]>
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Jens Axboe