quota: explicitly set ->dq_op and ->s_qcop

Only set the quota operation vectors if the filesystem actually supports
quota instead of doing it for all filesystems in alloc_super().

[Jan Kara: Export dquot_operations and vfs_quotactl_ops]

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

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index d3977c7128e3..60c989b7012f 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -1045,7 +1045,11 @@ magic_found:
          */
         sb->s_op = &ufs_super_ops;
         sb->s_export_op = &ufs_export_ops;
-        sb->dq_op = NULL; /***/
+#ifdef CONFIG_QUOTA
+        sb->s_qcop = &vfs_quotactl_ops;
+        sb->dq_op = NULL; /* &dquot_operations */
+#endif
+
         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 
         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);