335 struct async_cow {  struct
345 static noinline int add_async_extent(struct async_cow *cow,  in add_async_extent()  argument
403 					struct async_cow *async_cow,  in compress_file_range()  argument
611 		add_async_extent(async_cow, start, num_bytes,  in compress_file_range()
637 		add_async_extent(async_cow, start, end - start + 1,  in compress_file_range()
675 					      struct async_cow *async_cow)  in submit_compressed_extents()  argument
687 	while (!list_empty(&async_cow->extents)) {  in submit_compressed_extents()
688 		async_extent = list_entry(async_cow->extents.next,  in submit_compressed_extents()
705 			ret = cow_file_range(inode, async_cow->locked_page,  in submit_compressed_extents()
727 				unlock_page(async_cow->locked_page);  in submit_compressed_extents()
1078 	struct async_cow *async_cow;  in async_cow_start()  local
1080 	async_cow = container_of(work, struct async_cow, work);  in async_cow_start()
1082 	compress_file_range(async_cow->inode, async_cow->locked_page,  in async_cow_start()
1083 			    async_cow->start, async_cow->end, async_cow,  in async_cow_start()
1086 		btrfs_add_delayed_iput(async_cow->inode);  in async_cow_start()
1087 		async_cow->inode = NULL;  in async_cow_start()
1096 	struct async_cow *async_cow;  in async_cow_submit()  local
1100 	async_cow = container_of(work, struct async_cow, work);  in async_cow_submit()
1102 	root = async_cow->root;  in async_cow_submit()
1103 	nr_pages = (async_cow->end - async_cow->start + PAGE_CACHE_SIZE) >>  in async_cow_submit()
1114 	if (async_cow->inode)  in async_cow_submit()
1115 		submit_compressed_extents(async_cow->inode, async_cow);  in async_cow_submit()
1120 	struct async_cow *async_cow;  in async_cow_free()  local
1121 	async_cow = container_of(work, struct async_cow, work);  in async_cow_free()
1122 	if (async_cow->inode)  in async_cow_free()
1123 		btrfs_add_delayed_iput(async_cow->inode);  in async_cow_free()
1124 	kfree(async_cow);  in async_cow_free()
1131 	struct async_cow *async_cow;  in cow_file_range_async()  local
1140 		async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS);  in cow_file_range_async()
1141 		BUG_ON(!async_cow); /* -ENOMEM */  in cow_file_range_async()
1142 		async_cow->inode = igrab(inode);  in cow_file_range_async()
1143 		async_cow->root = root;  in cow_file_range_async()
1144 		async_cow->locked_page = locked_page;  in cow_file_range_async()
1145 		async_cow->start = start;  in cow_file_range_async()
1153 		async_cow->end = cur_end;  in cow_file_range_async()
1154 		INIT_LIST_HEAD(&async_cow->extents);  in cow_file_range_async()
1156 		btrfs_init_work(&async_cow->work,  in cow_file_range_async()
1166 				 &async_cow->work);  in cow_file_range_async()