xfs: add magic numbers to dquot buffer ops

Add dquot magic numbers to the buffer ops type, in case we ever want to
use them.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

fs/xfs/libxfs/xfs_dquot_buf.c

@@ -277,6 +277,8 @@ xfs_dquot_buf_write_verify(
 
 const struct xfs_buf_ops xfs_dquot_buf_ops = {
 	.name = "xfs_dquot",
+	.magic = { cpu_to_be16(XFS_DQUOT_MAGIC),
+		   cpu_to_be16(XFS_DQUOT_MAGIC) },
 	.verify_read = xfs_dquot_buf_read_verify,
 	.verify_write = xfs_dquot_buf_write_verify,
 	.verify_struct = xfs_dquot_buf_verify_struct,
@@ -284,6 +286,8 @@ const struct xfs_buf_ops xfs_dquot_buf_ops = {
 
 const struct xfs_buf_ops xfs_dquot_buf_ra_ops = {
 	.name = "xfs_dquot_ra",
+	.magic = { cpu_to_be16(XFS_DQUOT_MAGIC),
+		   cpu_to_be16(XFS_DQUOT_MAGIC) },
 	.verify_read = xfs_dquot_buf_readahead_verify,
 	.verify_write = xfs_dquot_buf_write_verify,
 };