This parameter was introduced alongside the function in
eb73c1b7cea7 ("Btrfs: introduce per-subvolume delalloc inode list") to
avoid deadlocks since this function was used in the transaction commit
path. However, commit 
8d875f95da43 ("btrfs: disable strict file flushes
for renames and truncates") removed that usage, rendering the parameter
obsolete.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
                               u32 min_type);
 
 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
-int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
-                              int nr);
+int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
                              unsigned int extra_bits,
                              struct extent_state **cached_state, int dedupe);
 
         * flush all outstanding I/O and inode extent mappings before the
         * copy operation is declared as being finished
         */
-       ret = btrfs_start_delalloc_roots(fs_info, 0, -1);
+       ret = btrfs_start_delalloc_roots(fs_info, -1);
        if (ret) {
                mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
                return ret;
 
                        need_commit--;
 
                        if (need_commit > 0) {
-                               btrfs_start_delalloc_roots(fs_info, 0, -1);
+                               btrfs_start_delalloc_roots(fs_info, -1);
                                btrfs_wait_ordered_roots(fs_info, U64_MAX, 0,
                                                         (u64)-1);
                        }
                 * the filesystem is readonly(all dirty pages are written to
                 * the disk).
                 */
-               btrfs_start_delalloc_roots(fs_info, 0, nr_items);
+               btrfs_start_delalloc_roots(fs_info, nr_items);
                if (!current->journal_info)
                        btrfs_wait_ordered_roots(fs_info, nr_items, 0, (u64)-1);
        }
 
        return ret;
 }
 
-int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
-                              int nr)
+int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr)
 {
        struct btrfs_root *root;
        struct list_head splice;
                               &fs_info->delalloc_roots);
                spin_unlock(&fs_info->delalloc_root_lock);
 
-               ret = __start_delalloc_inodes(root, delay_iput, nr);
+               ret = __start_delalloc_inodes(root, 0, nr);
                btrfs_put_fs_root(root);
                if (ret < 0)
                        goto out;
 
        case BTRFS_IOC_SYNC: {
                int ret;
 
-               ret = btrfs_start_delalloc_roots(fs_info, 0, -1);
+               ret = btrfs_start_delalloc_roots(fs_info, -1);
                if (ret)
                        return ret;
                ret = btrfs_sync_fs(inode->i_sb, 1);