xfs: kill xfs_qmops

Kill the quota ops function vector and replace it with direct calls or
stubs in the CONFIG_XFS_QUOTA=n case.

Make sure we check XFS_IS_QUOTA_RUNNING in the right spots.  We can remove
the number of those checks because the XFS_TRANS_DQ_DIRTY flag can't be set
otherwise.

This brings us back closer to the way this code worked in IRIX and earlier
Linux versions, but we keep a lot of the more useful factoring of common
code.

Eventually we should also kill xfs_qm_bhv.c, but that's left for a later
patch.

Reduces the size of the source code by about 250 lines and the size of
XFS module by about 1.5 kilobytes with quotas enabled:

   text	   data	    bss	    dec	    hex	filename
 615957	   2960	   3848	 622765	  980ad	fs/xfs/xfs.o
 617231	   3152	   3848	 624231	  98667	fs/xfs/xfs.o.old

Fallout:

 - xfs_qm_dqattach is split into xfs_qm_dqattach_locked which expects
   the inode locked and xfs_qm_dqattach which does the locking around it,
   thus removing XFS_QMOPT_ILOCKED.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index 60f107e47fe9..222c59e541ce 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -88,8 +88,7 @@ xfs-y				+= xfs_alloc.o \
                                    xfs_utils.o \
                                    xfs_vnodeops.o \
                                    xfs_rw.o \
-                                   xfs_dmops.o \
-                                   xfs_qmops.o
+                                   xfs_dmops.o
 
 xfs-$(CONFIG_XFS_TRACE)         += xfs_btree_trace.o \
                                    xfs_dir2_trace.o