760 		 * trimmed.  So when reading this in, the state should reflect  in __load_free_space_cache()
2269  *  1) Merge trimmed areas together
2270  *  2) Let untrimmed areas coalesce with trimmed areas
2278  * space is trimmed, it will prevent aggregating trimmed new region and
2547  * it on loading of a block group, we want to consider it trimmed.
2814  * btrfs_is_free_space_trimmed - see if everything is trimmed
2817  * Walk @block_group's free space rb_tree to determine if everything is trimmed.
3403 	u64 trimmed = 0;  in do_trimming()  local
3415 	ret = btrfs_discard_extent(fs_info, start, bytes, &trimmed);  in do_trimming()
3417 		*total_trimmed += trimmed;  in do_trimming()
3479 		/* Skip bitmaps and if async, already trimmed entries */  in trim_no_bitmap()
3647 		 * Bitmaps are marked trimmed lossily now to prevent constant  in trim_bitmaps()
3675 			 * We lossily consider a bitmap trimmed if we only skip  in trim_bitmaps()
3689 		 * We already trimmed a region, but are using the locking above  in trim_bitmaps()
3761 			   u64 *trimmed, u64 start, u64 end, u64 minlen)  in btrfs_trim_block_group()  argument
3767 	*trimmed = 0;  in btrfs_trim_block_group()
3777 	ret = trim_no_bitmap(block_group, trimmed, start, end, minlen, false);  in btrfs_trim_block_group()
3781 	ret = trim_bitmaps(block_group, trimmed, start, end, minlen, 0, false);  in btrfs_trim_block_group()
3792 				   u64 *trimmed, u64 start, u64 end, u64 minlen,  in btrfs_trim_block_group_extents()  argument
3797 	*trimmed = 0;  in btrfs_trim_block_group_extents()
3807 	ret = trim_no_bitmap(block_group, trimmed, start, end, minlen, async);  in btrfs_trim_block_group_extents()
3814 				   u64 *trimmed, u64 start, u64 end, u64 minlen,  in btrfs_trim_block_group_bitmaps()  argument
3819 	*trimmed = 0;  in btrfs_trim_block_group_bitmaps()
3829 	ret = trim_bitmaps(block_group, trimmed, start, end, minlen, maxlen,  in btrfs_trim_block_group_bitmaps()