2171 	struct extent_map *em;  in find_first_non_hole()  local
2174 	em = btrfs_get_extent(inode, NULL, 0,  in find_first_non_hole()
2177 	if (IS_ERR(em))  in find_first_non_hole()
2178 		return PTR_ERR(em);  in find_first_non_hole()
2181 	if (em->block_start == EXTENT_MAP_HOLE) {  in find_first_non_hole()
2183 		*len = em->start + em->len > *start + *len ?  in find_first_non_hole()
2184 		       0 : *start + *len - em->start - em->len;  in find_first_non_hole()
2185 		*start = em->start + em->len;  in find_first_non_hole()
2187 	free_extent_map(em);  in find_first_non_hole()
2827 	struct extent_map *em;  in btrfs_zero_range_check_range_boundary()  local
2831 	em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize);  in btrfs_zero_range_check_range_boundary()
2832 	if (IS_ERR(em))  in btrfs_zero_range_check_range_boundary()
2833 		return PTR_ERR(em);  in btrfs_zero_range_check_range_boundary()
2835 	if (em->block_start == EXTENT_MAP_HOLE)  in btrfs_zero_range_check_range_boundary()
2837 	else if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))  in btrfs_zero_range_check_range_boundary()
2842 	free_extent_map(em);  in btrfs_zero_range_check_range_boundary()
2852 	struct extent_map *em;  in btrfs_zero_range()  local
2862 	em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, alloc_start,  in btrfs_zero_range()
2864 	if (IS_ERR(em)) {  in btrfs_zero_range()
2865 		ret = PTR_ERR(em);  in btrfs_zero_range()
2877 	if (em->start <= alloc_start &&  in btrfs_zero_range()
2878 	    test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {  in btrfs_zero_range()
2879 		const u64 em_end = em->start + em->len;  in btrfs_zero_range()
2887 			free_extent_map(em);  in btrfs_zero_range()
2900 		alloc_hint = em->block_start + em->len;  in btrfs_zero_range()
2902 	free_extent_map(em);  in btrfs_zero_range()
2906 		em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, alloc_start,  in btrfs_zero_range()
2908 		if (IS_ERR(em)) {  in btrfs_zero_range()
2909 			ret = PTR_ERR(em);  in btrfs_zero_range()
2913 		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {  in btrfs_zero_range()
2914 			free_extent_map(em);  in btrfs_zero_range()
2919 		if (len < sectorsize && em->block_start != EXTENT_MAP_HOLE) {  in btrfs_zero_range()
2920 			free_extent_map(em);  in btrfs_zero_range()
2929 		free_extent_map(em);  in btrfs_zero_range()
3041 	struct extent_map *em;  in btrfs_fallocate()  local
3123 		em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, cur_offset,  in btrfs_fallocate()
3125 		if (IS_ERR(em)) {  in btrfs_fallocate()
3126 			ret = PTR_ERR(em);  in btrfs_fallocate()
3129 		last_byte = min(extent_map_end(em), alloc_end);  in btrfs_fallocate()
3130 		actual_end = min_t(u64, extent_map_end(em), offset + len);  in btrfs_fallocate()
3132 		if (em->block_start == EXTENT_MAP_HOLE ||  in btrfs_fallocate()
3134 		     !test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) {  in btrfs_fallocate()
3139 				free_extent_map(em);  in btrfs_fallocate()
3145 				free_extent_map(em);  in btrfs_fallocate()
3151 		free_extent_map(em);  in btrfs_fallocate()