582 	struct extent_map *split = NULL;  in btrfs_drop_extent_cache()  local
602 		if (!split)  in btrfs_drop_extent_cache()
603 			split = alloc_extent_map();  in btrfs_drop_extent_cache()
606 		if (!split || !split2)  in btrfs_drop_extent_cache()
638 			split->start = em->start;  in btrfs_drop_extent_cache()
639 			split->len = start - em->start;  in btrfs_drop_extent_cache()
642 				split->orig_start = em->orig_start;  in btrfs_drop_extent_cache()
643 				split->block_start = em->block_start;  in btrfs_drop_extent_cache()
646 					split->block_len = em->block_len;  in btrfs_drop_extent_cache()
648 					split->block_len = split->len;  in btrfs_drop_extent_cache()
649 				split->orig_block_len = max(split->block_len,  in btrfs_drop_extent_cache()
651 				split->ram_bytes = em->ram_bytes;  in btrfs_drop_extent_cache()
653 				split->orig_start = split->start;  in btrfs_drop_extent_cache()
654 				split->block_len = 0;  in btrfs_drop_extent_cache()
655 				split->block_start = em->block_start;  in btrfs_drop_extent_cache()
656 				split->orig_block_len = 0;  in btrfs_drop_extent_cache()
657 				split->ram_bytes = split->len;  in btrfs_drop_extent_cache()
660 			split->generation = gen;  in btrfs_drop_extent_cache()
661 			split->bdev = em->bdev;  in btrfs_drop_extent_cache()
662 			split->flags = flags;  in btrfs_drop_extent_cache()
663 			split->compress_type = em->compress_type;  in btrfs_drop_extent_cache()
664 			replace_extent_mapping(em_tree, em, split, modified);  in btrfs_drop_extent_cache()
665 			free_extent_map(split);  in btrfs_drop_extent_cache()
666 			split = split2;  in btrfs_drop_extent_cache()
672 			split->start = start + len;  in btrfs_drop_extent_cache()
673 			split->len = em->start + em->len - (start + len);  in btrfs_drop_extent_cache()
674 			split->bdev = em->bdev;  in btrfs_drop_extent_cache()
675 			split->flags = flags;  in btrfs_drop_extent_cache()
676 			split->compress_type = em->compress_type;  in btrfs_drop_extent_cache()
677 			split->generation = gen;  in btrfs_drop_extent_cache()
680 				split->orig_block_len = max(em->block_len,  in btrfs_drop_extent_cache()
683 				split->ram_bytes = em->ram_bytes;  in btrfs_drop_extent_cache()
685 					split->block_len = em->block_len;  in btrfs_drop_extent_cache()
686 					split->block_start = em->block_start;  in btrfs_drop_extent_cache()
687 					split->orig_start = em->orig_start;  in btrfs_drop_extent_cache()
689 					split->block_len = split->len;  in btrfs_drop_extent_cache()
690 					split->block_start = em->block_start  in btrfs_drop_extent_cache()
692 					split->orig_start = em->orig_start;  in btrfs_drop_extent_cache()
695 				split->ram_bytes = split->len;  in btrfs_drop_extent_cache()
696 				split->orig_start = split->start;  in btrfs_drop_extent_cache()
697 				split->block_len = 0;  in btrfs_drop_extent_cache()
698 				split->block_start = em->block_start;  in btrfs_drop_extent_cache()
699 				split->orig_block_len = 0;  in btrfs_drop_extent_cache()
703 				replace_extent_mapping(em_tree, em, split,  in btrfs_drop_extent_cache()
706 				ret = add_extent_mapping(em_tree, split,  in btrfs_drop_extent_cache()
710 			free_extent_map(split);  in btrfs_drop_extent_cache()
711 			split = NULL;  in btrfs_drop_extent_cache()
723 	if (split)  in btrfs_drop_extent_cache()
724 		free_extent_map(split);  in btrfs_drop_extent_cache()
1145 	u64 split;  in btrfs_mark_extent_written()  local
1157 	split = start;  in btrfs_mark_extent_written()
1160 	key.offset = split;  in btrfs_mark_extent_written()
1253 			split = end;  in btrfs_mark_extent_written()
1255 		new_key.offset = split;  in btrfs_mark_extent_written()
1271 						split - key.offset);  in btrfs_mark_extent_written()
1277 		btrfs_set_file_extent_offset(leaf, fi, split - orig_offset);  in btrfs_mark_extent_written()
1279 						extent_end - split);  in btrfs_mark_extent_written()
1290 		if (split == start) {  in btrfs_mark_extent_written()