357 struct async_extent {  struct
392 	struct async_extent *async_extent;  in add_async_extent()  local
394 	async_extent = kmalloc(sizeof(*async_extent), GFP_NOFS);  in add_async_extent()
395 	BUG_ON(!async_extent); /* -ENOMEM */  in add_async_extent()
396 	async_extent->start = start;  in add_async_extent()
397 	async_extent->ram_size = ram_size;  in add_async_extent()
398 	async_extent->compressed_size = compressed_size;  in add_async_extent()
399 	async_extent->pages = pages;  in add_async_extent()
400 	async_extent->nr_pages = nr_pages;  in add_async_extent()
401 	async_extent->compress_type = compress_type;  in add_async_extent()
402 	list_add_tail(&async_extent->list, &cow->extents);  in add_async_extent()
744 static void free_async_extent_pages(struct async_extent *async_extent)  in free_async_extent_pages()  argument
748 	if (!async_extent->pages)  in free_async_extent_pages()
751 	for (i = 0; i < async_extent->nr_pages; i++) {  in free_async_extent_pages()
752 		WARN_ON(async_extent->pages[i]->mapping);  in free_async_extent_pages()
753 		put_page(async_extent->pages[i]);  in free_async_extent_pages()
755 	kfree(async_extent->pages);  in free_async_extent_pages()
756 	async_extent->nr_pages = 0;  in free_async_extent_pages()
757 	async_extent->pages = NULL;  in free_async_extent_pages()
770 	struct async_extent *async_extent;  in submit_compressed_extents()  local
780 		async_extent = list_entry(async_chunk->extents.next,  in submit_compressed_extents()
781 					  struct async_extent, list);  in submit_compressed_extents()
782 		list_del(&async_extent->list);  in submit_compressed_extents()
785 		lock_extent(io_tree, async_extent->start,  in submit_compressed_extents()
786 			    async_extent->start + async_extent->ram_size - 1);  in submit_compressed_extents()
788 		if (!async_extent->pages) {  in submit_compressed_extents()
794 					     async_extent->start,  in submit_compressed_extents()
795 					     async_extent->start +  in submit_compressed_extents()
796 					     async_extent->ram_size - 1,  in submit_compressed_extents()
809 						  async_extent->start,  in submit_compressed_extents()
810 						  async_extent->start +  in submit_compressed_extents()
811 						  async_extent->ram_size - 1,  in submit_compressed_extents()
815 			kfree(async_extent);  in submit_compressed_extents()
820 		ret = btrfs_reserve_extent(root, async_extent->ram_size,  in submit_compressed_extents()
821 					   async_extent->compressed_size,  in submit_compressed_extents()
822 					   async_extent->compressed_size,  in submit_compressed_extents()
825 			free_async_extent_pages(async_extent);  in submit_compressed_extents()
828 				unlock_extent(io_tree, async_extent->start,  in submit_compressed_extents()
829 					      async_extent->start +  in submit_compressed_extents()
830 					      async_extent->ram_size - 1);  in submit_compressed_extents()
839 						async_extent->start,  in submit_compressed_extents()
840 						async_extent->start +  in submit_compressed_extents()
841 						async_extent->ram_size - 1);  in submit_compressed_extents()
851 		em = create_io_em(inode, async_extent->start,  in submit_compressed_extents()
852 				  async_extent->ram_size, /* len */  in submit_compressed_extents()
853 				  async_extent->start, /* orig_start */  in submit_compressed_extents()
857 				  async_extent->ram_size, /* ram_bytes */  in submit_compressed_extents()
858 				  async_extent->compress_type,  in submit_compressed_extents()
866 						async_extent->start,  in submit_compressed_extents()
868 						async_extent->ram_size,  in submit_compressed_extents()
871 						async_extent->compress_type);  in submit_compressed_extents()
873 			btrfs_drop_extent_cache(inode, async_extent->start,  in submit_compressed_extents()
874 						async_extent->start +  in submit_compressed_extents()
875 						async_extent->ram_size - 1, 0);  in submit_compressed_extents()
883 		extent_clear_unlock_delalloc(inode, async_extent->start,  in submit_compressed_extents()
884 				async_extent->start +  in submit_compressed_extents()
885 				async_extent->ram_size - 1,  in submit_compressed_extents()
889 		if (btrfs_submit_compressed_write(inode, async_extent->start,  in submit_compressed_extents()
890 				    async_extent->ram_size,  in submit_compressed_extents()
892 				    ins.offset, async_extent->pages,  in submit_compressed_extents()
893 				    async_extent->nr_pages,  in submit_compressed_extents()
896 			struct page *p = async_extent->pages[0];  in submit_compressed_extents()
897 			const u64 start = async_extent->start;  in submit_compressed_extents()
898 			const u64 end = start + async_extent->ram_size - 1;  in submit_compressed_extents()
907 			free_async_extent_pages(async_extent);  in submit_compressed_extents()
910 		kfree(async_extent);  in submit_compressed_extents()
918 	extent_clear_unlock_delalloc(inode, async_extent->start,  in submit_compressed_extents()
919 				     async_extent->start +  in submit_compressed_extents()
920 				     async_extent->ram_size - 1,  in submit_compressed_extents()
927 	free_async_extent_pages(async_extent);  in submit_compressed_extents()
928 	kfree(async_extent);  in submit_compressed_extents()