[PATCHSET 0/2] Fix issue with (and clarify) linked timeouts

[Jens Axboe <axboe@kernel.dk>]

First patch is just a prep patch that cleans up the return values from
the various queueing functions, and the second one fixes sequencing
issues with linked timeouts, as well as makes it so that we only support
one linked timeout in a chain (and only as the 2nd request). We can relax
this restriction later, if it makes sense, for now I think we should just
play it safe. This doesn't mean that you can only submit a request and
timeout in a submission, just that requests that are linked with
IOSQE_LINK must have a parent request and then a timeout tied to that.
That's the intended use case anyway, a timeout is paired with one other
parent request.

 fs/io_uring.c | 79 +++++++++++++++++++++++++++++----------------------
 1 file changed, 45 insertions(+), 34 deletions(-)

-- 
Jens Axboe