5.10 stable backports

Attachments:

• 0005-io-wq-fix-wakeup-race-when-adding-new-work.patch (text/x-patch — 1.9 KB)
• 0004-io_uring-fail-links-of-cancelled-timeouts.patch (text/x-patch — 1.1 KB)
• 0003-io_uring-add-splice_fd_in-checks.patch (text/x-patch — 7.0 KB)
• 0001-io_uring-limit-fixed-table-size-by-RLIMIT_NOFILE.patch (text/x-patch — 1.1 KB)
• 0002-io_uring-place-fixed-tables-under-memcg-limits.patch (text/x-patch — 1.8 KB)