fs/io_uring.c stable additions

Hi,

I forgot to mark a few patches for io_uring as stable. In order of how to apply, can you add the following commits for 5.2?

f7b76ac9d17e16e44feebb6d2749fec92bfd6dd4 c0e48f9dea9129aa11bec3ed13803bcc26e96e49 bd11b3a391e3df6fa958facbe4b3f9f4cca9bd49 36703247d5f52a679df9da51192b6950fe81689f

Thanks!