Merge tag 'for-linus-4.9-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubca...

Pull orangefs updates from Mike Marshall:
 "Miscellaneous improvements:
   - clean up debugfs globals
   - remove dead code in sysfs
   - reorganize duplicated sysfs attribute structs
   - consolidate sysfs show and store functions
   - remove duplicated sysfs_ops structures
   - describe organization of sysfs
   - make devreq_mutex static
   - g_orangefs_stats -> orangefs_stats for consistency
   - rename most remaining global variables

  Feature negotiation:
   - enable Orangefs userspace and kernel module to negotiate mutually
     supported features"

* tag 'for-linus-4.9-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  Revert "orangefs: bump minimum userspace version"
  orangefs: bump minimum userspace version
  orangefs: rename most remaining global variables
  orangefs: g_orangefs_stats -> orangefs_stats for consistency
  orangefs: make devreq_mutex static
  orangefs: describe organization of sysfs
  orangefs: remove duplicated sysfs_ops structures
  orangefs: consolidate sysfs show and store functions
  orangefs: reorganize duplicated sysfs attribute structs
  orangefs: remove dead code in sysfs
  orangefs: clean up debugfs globals
  orangefs: do not allow client readahead cache without feature bit
  orangefs: add features op
  orangefs: record userspace version for feature compatbility
  orangefs: add readahead count and size to sysfs
  orangefs: re-add flush_racache from out-of-tree
  orangefs: turn param response value into union
  orangefs: add missing param request ops
  orangefs: rename remaining bits of mmap readahead cache