quota: clean up Q_XQUOTASYNC

Currently Q_XQUOTASYNC calls into the quota_sync method, but XFS does something
entirely different in it than the rest of the filesystems.  xfs_quota which
calls Q_XQUOTASYNC expects an asynchronous data writeout to flush delayed
allocations, while the "VFS" quota support wants to flush changes to the quota
file.

So make Q_XQUOTASYNC call into the writeback code directly and make the
quota_sync method optional as XFS doesn't need in the sense expected by the
rest of the quota code.

GFS2 was using limited XFS-style quota and has a quota_sync method fitting
neither the style used by vfs_quota_sync nor xfs_fs_quota_sync.  I left it
in for now as per discussion with Steve it expects to be called from the
sync path this way.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 0 insertions, 15 deletions

diff --git a/fs/xfs/linux-2.6/xfs_quotaops.c b/fs/xfs/linux-2.6/xfs_quotaops.c
index 3d4a0c84d634..07d67c624922 100644
--- a/fs/xfs/linux-2.6/xfs_quotaops.c
+++ b/fs/xfs/linux-2.6/xfs_quotaops.c
@@ -44,20 +44,6 @@ xfs_quota_type(int type)
 }
 
 STATIC int
-xfs_fs_quota_sync(
-	struct super_block	*sb,
-	int			type)
-{
-	struct xfs_mount	*mp = XFS_M(sb);
-
-	if (sb->s_flags & MS_RDONLY)
-		return -EROFS;
-	if (!XFS_IS_QUOTA_RUNNING(mp))
-		return -ENOSYS;
-	return -xfs_sync_data(mp, 0);
-}
-
-STATIC int
 xfs_fs_get_xstate(
 	struct super_block	*sb,
 	struct fs_quota_stat	*fqs)
@@ -151,7 +137,6 @@ xfs_fs_set_xquota(
 }
 
 const struct quotactl_ops xfs_quotactl_operations = {
-	.quota_sync		= xfs_fs_quota_sync,
 	.get_xstate		= xfs_fs_get_xstate,
 	.set_xstate		= xfs_fs_set_xstate,
 	.get_xquota		= xfs_fs_get_xquota,