io_uring: deduplicate freeing linked timeouts

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Linked timeout cancellation code is repeated in in io_req_link_next()
and io_fail_links(), and they differ in details even though shouldn't.
Basing on the fact that there is maximum one armed linked timeout in
a link, and it immediately follows the head, extract a function that
will check for it and defuse.

Justification:
- DRY and cleaner
- better inlining for io_req_link_next() (just 1 call site now)
- isolates linked_timeouts from common path
- reduces time under spinlock for failed links
- actually less code

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
[axboe: fold in locking fix for io_fail_links()]
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2020-06-29 13:12:59 +03:00 • committed by Jens Axboe

parent fb49278624

commit 7c86ffeeed

1 changed files with 58 additions and 49 deletions

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fs/io_uring.c

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