Merge branch 'io_uring-7.0' into for-7.1/io_uring

Merge branch 'io_uring-7.0' into for-7.1/io_uring

Merge upstream io_uring fixes to avoid conflicts in later patches.

* io_uring-7.0:
  io_uring/kbuf: check if target buffer list is still legacy on recycle
  io_uring: fix physical SQE bounds check for SQE_MIXED 128-byte ops
  io_uring/eventfd: use ctx->rings_rcu for flags checking
  io_uring: ensure ctx->rings is stable for task work flags manipulation
  io_uring/bpf_filter: use bpf_prog_run_pin_on_cpu() to prevent migration
  io_uring/register: fix comment about task_no_new_privs