[PATCH 0/12 v3] Moving i_dquot out of struct inode

  Hello,

  this patch set moves i_dquot array from struct inode into filesystem private
part of the inode. Thus filesystems which don't need it save 2 pointers in
their inodes (would be 3 after we add project quota support into generic
quota).

The patch series also contains a change to quotactl so that each filesystem
can set quota types it supports. This is in the end unrelated change
(originally it was necessary for i_dquot moving but in the end I changed
things so that it's not anymore). I can move that into a separate series
but I was somewhat reluctant to do that since that would mean another 6
one-line patches to the same files we are changing here...

If people like the patches, I will queue this series into my tree for
the next merge window. For that I'd prefer to get acks from affected fs
maintainers (the changes are pretty trivial and I don't feel it's a must but
still I'd prefer fs maintainers to ack they are aware of the changes).

								Honza

Changes since v1:
* Inode field names are now named enum
* Quota type masks now have names like QTYPE_MASK_{USR|GRP|PRJ} instead of
  opencoding shifts.

Changes since v2:
* Use ->get_dquots callback instead of inode fields framework
* rebased on Linus' tree as of 3.18-rc1 + something.

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