359 struct async_cow {  struct
370 static noinline int add_async_extent(struct async_cow *cow,  in add_async_extent()  argument
440 					struct async_cow *async_cow,  in compress_file_range()  argument
624 			add_async_extent(async_cow, start, total_in,  in compress_file_range()
671 	add_async_extent(async_cow, start, end - start + 1, 0, NULL, 0,  in compress_file_range()
708 					      struct async_cow *async_cow)  in submit_compressed_extents()  argument
720 	while (!list_empty(&async_cow->extents)) {  in submit_compressed_extents()
721 		async_extent = list_entry(async_cow->extents.next,  in submit_compressed_extents()
738 			ret = cow_file_range(inode, async_cow->locked_page,  in submit_compressed_extents()
762 				unlock_page(async_cow->locked_page);  in submit_compressed_extents()
849 				    async_cow->write_flags)) {  in submit_compressed_extents()
1127 	struct async_cow *async_cow;  in async_cow_start()  local
1129 	async_cow = container_of(work, struct async_cow, work);  in async_cow_start()
1131 	compress_file_range(async_cow->inode, async_cow->locked_page,  in async_cow_start()
1132 			    async_cow->start, async_cow->end, async_cow,  in async_cow_start()
1135 		btrfs_add_delayed_iput(async_cow->inode);  in async_cow_start()
1136 		async_cow->inode = NULL;  in async_cow_start()
1146 	struct async_cow *async_cow;  in async_cow_submit()  local
1150 	async_cow = container_of(work, struct async_cow, work);  in async_cow_submit()
1152 	root = async_cow->root;  in async_cow_submit()
1154 	nr_pages = (async_cow->end - async_cow->start + PAGE_SIZE) >>  in async_cow_submit()
1162 	if (async_cow->inode)  in async_cow_submit()
1163 		submit_compressed_extents(async_cow->inode, async_cow);  in async_cow_submit()
1168 	struct async_cow *async_cow;  in async_cow_free()  local
1169 	async_cow = container_of(work, struct async_cow, work);  in async_cow_free()
1170 	if (async_cow->inode)  in async_cow_free()
1171 		btrfs_add_delayed_iput(async_cow->inode);  in async_cow_free()
1172 	kfree(async_cow);  in async_cow_free()
1181 	struct async_cow *async_cow;  in cow_file_range_async()  local
1189 		async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS);  in cow_file_range_async()
1190 		BUG_ON(!async_cow); /* -ENOMEM */  in cow_file_range_async()
1191 		async_cow->inode = igrab(inode);  in cow_file_range_async()
1192 		async_cow->root = root;  in cow_file_range_async()
1193 		async_cow->locked_page = locked_page;  in cow_file_range_async()
1194 		async_cow->start = start;  in cow_file_range_async()
1195 		async_cow->write_flags = write_flags;  in cow_file_range_async()
1203 		async_cow->end = cur_end;  in cow_file_range_async()
1204 		INIT_LIST_HEAD(&async_cow->extents);  in cow_file_range_async()
1206 		btrfs_init_work(&async_cow->work,  in cow_file_range_async()
1215 		btrfs_queue_work(fs_info->delalloc_workers, &async_cow->work);  in cow_file_range_async()