io_uring: simplify io_resubmit_prep()

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If not for async_data NULL check, io_resubmit_prep() is already an rw
specific version of io_req_prep_async(), but slower because 1) it always
goes through io_import_iovec() even if following io_setup_async_rw() the
result 2) instead of initialising iovec/iter in-place it does it
on-stack and then copies with io_setup_async_rw().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2021-02-28 22:35:20 +00:00 • committed by Jens Axboe

parent b7e298d265

commit 179ae0d15e

1 changed files with 3 additions and 34 deletions

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37

fs/io_uring.c

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