FUSE_FORGET requests are not used in some cases but have an impact on the
system. So add no forget support.

Patch 1 simplifies the queueing process of FUSE_FORGET request when error happens, 
which Patch 2 depends on.

Patch 2 does the actual work about the no forget support.  

yangyun (2):
  fuse: replace fuse_queue_forget with fuse_force_forget if error
  fuse: add support for no forget requests

 fs/fuse/dev.c             | 25 ++++++++++++++++
 fs/fuse/dir.c             | 63 +++++++++------------------------------
 fs/fuse/fuse_i.h          | 26 ++++++++++++++++
 fs/fuse/inode.c           | 10 +++----
 fs/fuse/readdir.c         | 37 +++++------------------
 include/uapi/linux/fuse.h |  3 ++
 6 files changed, 81 insertions(+), 83 deletions(-)

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2.33.0