{
 }
 
-static struct seq_operations ext4_mb_seq_history_ops = {
+static const struct seq_operations ext4_mb_seq_history_ops = {
        .start  = ext4_mb_seq_history_start,
        .next   = ext4_mb_seq_history_next,
        .stop   = ext4_mb_seq_history_stop,
        return count;
 }
 
-static struct file_operations ext4_mb_seq_history_fops = {
+static const struct file_operations ext4_mb_seq_history_fops = {
        .owner          = THIS_MODULE,
        .open           = ext4_mb_seq_history_open,
        .read           = seq_read,
 {
 }
 
-static struct seq_operations ext4_mb_seq_groups_ops = {
+static const struct seq_operations ext4_mb_seq_groups_ops = {
        .start  = ext4_mb_seq_groups_start,
        .next   = ext4_mb_seq_groups_next,
        .stop   = ext4_mb_seq_groups_stop,
 
 }
 
-static struct file_operations ext4_mb_seq_groups_fops = {
+static const struct file_operations ext4_mb_seq_groups_fops = {
        .owner          = THIS_MODULE,
        .open           = ext4_mb_seq_groups_open,
        .read           = seq_read,