450 struct async_chunk {  struct
465 	struct async_chunk chunks[];  argument
468 static noinline int add_async_extent(struct async_chunk *cow,  in add_async_extent()
560 static noinline int compress_file_range(struct async_chunk *async_chunk)  in compress_file_range()  argument
562 	struct inode *inode = async_chunk->inode;  in compress_file_range()
565 	u64 start = async_chunk->start;  in compress_file_range()
566 	u64 end = async_chunk->end;  in compress_file_range()
772 			add_async_extent(async_chunk, start, total_in,  in compress_file_range()
812 	if (async_chunk->locked_page &&  in compress_file_range()
813 	    (page_offset(async_chunk->locked_page) >= start &&  in compress_file_range()
814 	     page_offset(async_chunk->locked_page)) <= end) {  in compress_file_range()
815 		__set_page_dirty_nobuffers(async_chunk->locked_page);  in compress_file_range()
821 	add_async_extent(async_chunk, start, end - start + 1, 0, NULL, 0,  in compress_file_range()
850 static noinline void submit_compressed_extents(struct async_chunk *async_chunk)  in submit_compressed_extents()  argument
852 	struct btrfs_inode *inode = BTRFS_I(async_chunk->inode);  in submit_compressed_extents()
863 	while (!list_empty(&async_chunk->extents)) {  in submit_compressed_extents()
864 		async_extent = list_entry(async_chunk->extents.next,  in submit_compressed_extents()
877 			ret = cow_file_range(inode, async_chunk->locked_page,  in submit_compressed_extents()
897 			else if (ret && async_chunk->locked_page)  in submit_compressed_extents()
898 				unlock_page(async_chunk->locked_page);  in submit_compressed_extents()
976 				    async_chunk->write_flags,  in submit_compressed_extents()
977 				    async_chunk->blkcg_css)) {  in submit_compressed_extents()
1286 	struct async_chunk *async_chunk;  in async_cow_start()  local
1289 	async_chunk = container_of(work, struct async_chunk, work);  in async_cow_start()
1291 	compressed_extents = compress_file_range(async_chunk);  in async_cow_start()
1293 		btrfs_add_delayed_iput(async_chunk->inode);  in async_cow_start()
1294 		async_chunk->inode = NULL;  in async_cow_start()
1303 	struct async_chunk *async_chunk = container_of(work, struct async_chunk,  in async_cow_submit()  local
1308 	nr_pages = (async_chunk->end - async_chunk->start + PAGE_SIZE) >>  in async_cow_submit()
1317 	if (async_chunk->inode)  in async_cow_submit()
1318 		submit_compressed_extents(async_chunk);  in async_cow_submit()
1328 	struct async_chunk *async_chunk;  in async_cow_free()  local
1330 	async_chunk = container_of(work, struct async_chunk, work);  in async_cow_free()
1331 	if (async_chunk->inode)  in async_cow_free()
1332 		btrfs_add_delayed_iput(async_chunk->inode);  in async_cow_free()
1333 	if (async_chunk->blkcg_css)  in async_cow_free()
1334 		css_put(async_chunk->blkcg_css);  in async_cow_free()
1339 	if (atomic_dec_and_test(async_chunk->pending))  in async_cow_free()
1340 		kvfree(async_chunk->pending);  in async_cow_free()
1352 	struct async_chunk *async_chunk;  in cow_file_range_async()  local
1387 	async_chunk = ctx->chunks;  in cow_file_range_async()
1401 		async_chunk[i].pending = &ctx->num_chunks;  in cow_file_range_async()
1402 		async_chunk[i].inode = &inode->vfs_inode;  in cow_file_range_async()
1403 		async_chunk[i].start = start;  in cow_file_range_async()
1404 		async_chunk[i].end = cur_end;  in cow_file_range_async()
1405 		async_chunk[i].write_flags = write_flags;  in cow_file_range_async()
1406 		INIT_LIST_HEAD(&async_chunk[i].extents);  in cow_file_range_async()
1429 			async_chunk[i].locked_page = locked_page;  in cow_file_range_async()
1432 			async_chunk[i].locked_page = NULL;  in cow_file_range_async()
1437 			async_chunk[i].blkcg_css = blkcg_css;  in cow_file_range_async()
1439 			async_chunk[i].blkcg_css = NULL;  in cow_file_range_async()
1442 		btrfs_init_work(&async_chunk[i].work, async_cow_start,  in cow_file_range_async()
1448 		btrfs_queue_work(fs_info->delalloc_workers, &async_chunk[i].work);  in cow_file_range_async()