Description: io-wq: fix cancellation on create-worker failure
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2026484
 https://git.kernel.dk/cgit/linux-block/commit/?h=io_uring-5.15&id=713b9825a4c47897f66ad69409581e7734a8728e
 https://lkml.org/lkml/2021/9/8/64
Notes:
 bwh> It's unclear to me whether this was introduced in 5.15-rc1 by commit
 bwh> 3146cba99aa2 "io-wq: make worker creation resilient against signals"
 bwh> or whether the issue already existed and both commits were needed to
 bwh> fix it.
Bugs:
upstream: released (5.15-rc1) [713b9825a4c47897f66ad69409581e7734a8728e]
6.1-upstream-stable: N/A "Fixed before branch point"
5.10-upstream-stable:
4.19-upstream-stable: N/A "Vulnerable code introduced later"
4.9-upstream-stable: N/A "Vulnerable code introduced later"
sid: released (5.15.3-1)
6.1-bookworm-security: N/A "Fixed before branch point"
5.10-bullseye-security:
4.19-buster-security: N/A "Vulnerable code introduced later"
4.9-stretch-security: N/A "Vulnerable code introduced later"