io_uring: restructure submit sqes to_submit checks

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Put an explicit check for number of requests to submit. First,
we can turn while into do-while and it generates better code, and second
that if can be cheaper, e.g. by using CPU flags after sub in
io_sqring_entries().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/5926baadd20c28feab7a5e1725fedf32e4553ff7.1632516769.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2021-09-24 22:00:01 +01:00 • committed by Jens Axboe

parent d9f9d2842c

commit 6962980947

1 changed files with 6 additions and 3 deletions

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fs/io_uring.c

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