328 struct async_cow {  struct
338 static noinline int add_async_extent(struct async_cow *cow,  in add_async_extent()  argument
396 					struct async_cow *async_cow,  in compress_file_range()  argument
604 		add_async_extent(async_cow, start, num_bytes,  in compress_file_range()
630 		add_async_extent(async_cow, start, end - start + 1,  in compress_file_range()
668 					      struct async_cow *async_cow)  in submit_compressed_extents()  argument
680 	while (!list_empty(&async_cow->extents)) {  in submit_compressed_extents()
681 		async_extent = list_entry(async_cow->extents.next,  in submit_compressed_extents()
698 			ret = cow_file_range(inode, async_cow->locked_page,  in submit_compressed_extents()
720 				unlock_page(async_cow->locked_page);  in submit_compressed_extents()
1071 	struct async_cow *async_cow;  in async_cow_start()  local
1073 	async_cow = container_of(work, struct async_cow, work);  in async_cow_start()
1075 	compress_file_range(async_cow->inode, async_cow->locked_page,  in async_cow_start()
1076 			    async_cow->start, async_cow->end, async_cow,  in async_cow_start()
1079 		btrfs_add_delayed_iput(async_cow->inode);  in async_cow_start()
1080 		async_cow->inode = NULL;  in async_cow_start()
1089 	struct async_cow *async_cow;  in async_cow_submit()  local
1093 	async_cow = container_of(work, struct async_cow, work);  in async_cow_submit()
1095 	root = async_cow->root;  in async_cow_submit()
1096 	nr_pages = (async_cow->end - async_cow->start + PAGE_CACHE_SIZE) >>  in async_cow_submit()
1104 	if (async_cow->inode)  in async_cow_submit()
1105 		submit_compressed_extents(async_cow->inode, async_cow);  in async_cow_submit()
1110 	struct async_cow *async_cow;  in async_cow_free()  local
1111 	async_cow = container_of(work, struct async_cow, work);  in async_cow_free()
1112 	if (async_cow->inode)  in async_cow_free()
1113 		btrfs_add_delayed_iput(async_cow->inode);  in async_cow_free()
1114 	kfree(async_cow);  in async_cow_free()
1121 	struct async_cow *async_cow;  in cow_file_range_async()  local
1130 		async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS);  in cow_file_range_async()
1131 		BUG_ON(!async_cow); /* -ENOMEM */  in cow_file_range_async()
1132 		async_cow->inode = igrab(inode);  in cow_file_range_async()
1133 		async_cow->root = root;  in cow_file_range_async()
1134 		async_cow->locked_page = locked_page;  in cow_file_range_async()
1135 		async_cow->start = start;  in cow_file_range_async()
1143 		async_cow->end = cur_end;  in cow_file_range_async()
1144 		INIT_LIST_HEAD(&async_cow->extents);  in cow_file_range_async()
1146 		btrfs_init_work(&async_cow->work,  in cow_file_range_async()
1156 				 &async_cow->work);  in cow_file_range_async()