370 struct async_cow {  struct
381 static noinline int add_async_extent(struct async_cow *cow,  in add_async_extent()  argument
472 					struct async_cow *async_cow,  in compress_file_range()  argument
671 			add_async_extent(async_cow, start, total_in,  in compress_file_range()
718 	add_async_extent(async_cow, start, end - start + 1, 0, NULL, 0,  in compress_file_range()
748 					      struct async_cow *async_cow)  in submit_compressed_extents()  argument
760 	while (!list_empty(&async_cow->extents)) {  in submit_compressed_extents()
761 		async_extent = list_entry(async_cow->extents.next,  in submit_compressed_extents()
778 			ret = cow_file_range(inode, async_cow->locked_page,  in submit_compressed_extents()
802 				unlock_page(async_cow->locked_page);  in submit_compressed_extents()
889 				    async_cow->write_flags)) {  in submit_compressed_extents()
1184 	struct async_cow *async_cow;  in async_cow_start()  local
1186 	async_cow = container_of(work, struct async_cow, work);  in async_cow_start()
1188 	compress_file_range(async_cow->inode, async_cow->locked_page,  in async_cow_start()
1189 			    async_cow->start, async_cow->end, async_cow,  in async_cow_start()
1192 		btrfs_add_delayed_iput(async_cow->inode);  in async_cow_start()
1193 		async_cow->inode = NULL;  in async_cow_start()
1203 	struct async_cow *async_cow;  in async_cow_submit()  local
1207 	async_cow = container_of(work, struct async_cow, work);  in async_cow_submit()
1209 	root = async_cow->root;  in async_cow_submit()
1211 	nr_pages = (async_cow->end - async_cow->start + PAGE_SIZE) >>  in async_cow_submit()
1219 	if (async_cow->inode)  in async_cow_submit()
1220 		submit_compressed_extents(async_cow->inode, async_cow);  in async_cow_submit()
1225 	struct async_cow *async_cow;  in async_cow_free()  local
1226 	async_cow = container_of(work, struct async_cow, work);  in async_cow_free()
1227 	if (async_cow->inode)  in async_cow_free()
1228 		btrfs_add_delayed_iput(async_cow->inode);  in async_cow_free()
1229 	kfree(async_cow);  in async_cow_free()
1238 	struct async_cow *async_cow;  in cow_file_range_async()  local
1246 		async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS);  in cow_file_range_async()
1247 		BUG_ON(!async_cow); /* -ENOMEM */  in cow_file_range_async()
1248 		async_cow->inode = igrab(inode);  in cow_file_range_async()
1249 		async_cow->root = root;  in cow_file_range_async()
1250 		async_cow->locked_page = locked_page;  in cow_file_range_async()
1251 		async_cow->start = start;  in cow_file_range_async()
1252 		async_cow->write_flags = write_flags;  in cow_file_range_async()
1260 		async_cow->end = cur_end;  in cow_file_range_async()
1261 		INIT_LIST_HEAD(&async_cow->extents);  in cow_file_range_async()
1263 		btrfs_init_work(&async_cow->work,  in cow_file_range_async()
1272 		btrfs_queue_work(fs_info->delalloc_workers, &async_cow->work);  in cow_file_range_async()