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enable io_uring

Jeff Moyer requested to merge jmoyer1/centos-stream-9:guilt/io_uring-6.2-fixes into main

Merge Request Required Information

Summary of Changes

This MR updates RHEL's io_uring implementation to match upstream v6.2 + fixes (Fixes: tags and Cc: stable commits). The final 3 RHEL-only patches disable the feature by default, taint the kernel when it is enabled, and turn on the config option.

Approved Development Ticket

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2068237
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2170014
Depends: !2214 (merged)
Omitted-fix: b0b7a7d24b66 ("io_uring: return back links tw run optimisation")
This is actually just an optimization, and it has non-trivial conflicts which would require additional backports to resolve. Skip it.
Omitted-fix: 7d481e035633 ("io_uring/rsrc: fix DEFER_TASKRUN rsrc quiesce")
This fix is incorrectly tagged. The code that it applies to is not present in our tree.

Signed-off-by: Jeff Moyer jmoyer@redhat.com

Edited by Jeff Moyer

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