Merge branch 'io_uring-6.16' into for-6.17/io_uring

Merge in 6.16 io_uring fixes, to avoid clashes with pending net and
settings changes.

* io_uring-6.16:
  io_uring: gate REQ_F_ISREG on !S_ANON_INODE as well
  io_uring/kbuf: flag partial buffer mappings
  io_uring/net: mark iov as dynamically allocated even for single segments
  io_uring: fix resource leak in io_import_dmabuf()
  io_uring: don't assume uaddr alignment in io_vec_fill_bvec
  io_uring/rsrc: don't rely on user vaddr alignment
  io_uring/rsrc: fix folio unpinning
  io_uring: make fallocate be hashed work