• Linus Torvalds's avatar
    Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 16382e17
    Linus Torvalds authored
    Pull iov_iter updates from Al Viro:
    
     - bio_{map,copy}_user_iov() series; those are cleanups - fixes from the
       same pile went into mainline (and stable) in late September.
    
     - fs/iomap.c iov_iter-related fixes
    
     - new primitive - iov_iter_for_each_range(), which applies a function
       to kernel-mapped segments of an iov_iter.
    
       Usable for kvec and bvec ones, the latter does kmap()/kunmap() around
       the callback. _Not_ usable for iovec- or pipe-backed iov_iter; the
       latter is not hard to fix if the need ever appears, the former is by
       design.
    
       Another related primitive will have to wait for the next cycle - it
       passes page + offset + size instead of pointer + size, and that one
       will be usable for everything _except_ kvec. Unfortunately, that one
       didn't get exposure in -next yet, so...
    
     - a bit more lustre iov_iter work, including a use case for
       iov_iter_for_each_range() (checksum calculation)
    
     - vhost/scsi leak fix in failure exit
    
     - misc cleanups and detritectomy...
    
    * 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (21 commits)
      iomap_dio_actor(): fix iov_iter bugs
      switch ksocknal_lib_recv_...() to use of iov_iter_for_each_range()
      lustre: switch struct ksock_conn to iov_iter
      vhost/scsi: switch to iov_iter_get_pages()
      fix a page leak in vhost_scsi_iov_to_sgl() error recovery
      new primitive: iov_iter_for_each_range()
      lnet_return_rx_credits_locked: don't abuse list_entry
      xen: don't open-code iov_iter_kvec()
      orangefs: remove detritus from struct orangefs_kiocb_s
      kill iov_shorten()
      bio_alloc_map_data(): do bmd->iter setup right there
      bio_copy_user_iov(): saner bio size calculation
      bio_map_user_iov(): get rid of copying iov_iter
      bio_copy_from_iter(): get rid of copying iov_iter
      move more stuff down into bio_copy_user_iov()
      blk_rq_map_user_iov(): move iov_iter_advance() down
      bio_map_user_iov(): get rid of the iov_for_each()
      bio_map_user_iov(): move alignment check into the main loop
      don't rely upon subsequent bio_add_pc_page() calls failing
      ... and with iov_iter_get_pages_alloc() it becomes even simpler
      ...
    16382e17