io_uring: pull in fixes from upstream
Pull in commits with Fixes: tags and Cc: stable from upstream. Also pull in a commit which introduces a sysctl to disable io_uring. This prevents RHEL from deviating from upstream in that respect. The series starts out by reverting rhel-specific changes to mark io_uring tech preview and disable io_uring by default. At the end, those two changes are re-introduced.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2217069
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2218611
CVE: CVE-2023-3389
Signed-off-by: Jeff Moyer jmoyer@redhat.com