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/udf/super.c b/fs/udf/super.c
index 76a61566f299..ef9221b7456e 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1948,7 +1948,11 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
         /* Fill in the rest of the superblock */
         sb->s_op = &udf_sb_ops;
         sb->s_export_op = &udf_export_ops;
-        sb->dq_op = NULL;
+#ifdef CONFIG_QUOTA
+        sb->s_qcop = &vfs_quotactl_ops;
+        sb->dq_op = NULL; /* &dquot_operations */
+#endif
+
         sb->s_dirt = 0;
         sb->s_magic = UDF_SUPER_MAGIC;
         sb->s_time_gran = 1000;