2763 	u64 alloc_start = round_down(offset, sectorsize);  in btrfs_zero_range()  local
2768 	em = btrfs_get_extent(BTRFS_I(inode), NULL, alloc_start,  in btrfs_zero_range()
2769 			      alloc_end - alloc_start);  in btrfs_zero_range()
2783 	if (em->start <= alloc_start && (em->flags & EXTENT_FLAG_PREALLOC)) {  in btrfs_zero_range()
2801 		alloc_start = em_end;  in btrfs_zero_range()
2802 		ASSERT(IS_ALIGNED(alloc_start, sectorsize));  in btrfs_zero_range()
2803 		len = offset + len - alloc_start;  in btrfs_zero_range()
2804 		offset = alloc_start;  in btrfs_zero_range()
2811 		em = btrfs_get_extent(BTRFS_I(inode), NULL, alloc_start, sectorsize);  in btrfs_zero_range()
2834 		alloc_start = round_down(offset, sectorsize);  in btrfs_zero_range()
2835 		alloc_end = alloc_start + sectorsize;  in btrfs_zero_range()
2839 	alloc_start = round_up(offset, sectorsize);  in btrfs_zero_range()
2854 			alloc_start = round_down(offset, sectorsize);  in btrfs_zero_range()
2884 	if (alloc_start < alloc_end) {  in btrfs_zero_range()
2886 		const u64 lockstart = alloc_start;  in btrfs_zero_range()
2889 		bytes_to_reserve = alloc_end - alloc_start;  in btrfs_zero_range()
2898 						alloc_start, bytes_to_reserve);  in btrfs_zero_range()
2904 		ret = btrfs_prealloc_file_range(inode, mode, alloc_start,  in btrfs_zero_range()
2905 						alloc_end - alloc_start,  in btrfs_zero_range()
2920 					       alloc_start, bytes_to_reserve);  in btrfs_zero_range()
2937 	u64 alloc_start;  in btrfs_fallocate()  local
2953 	alloc_start = round_down(offset, blocksize);  in btrfs_fallocate()
2955 	cur_offset = alloc_start;  in btrfs_fallocate()
2984 	if (alloc_start > inode->i_size) {  in btrfs_fallocate()
2986 					alloc_start);  in btrfs_fallocate()
3008 	ret = btrfs_wait_ordered_range(BTRFS_I(inode), alloc_start,  in btrfs_fallocate()
3009 				       alloc_end - alloc_start);  in btrfs_fallocate()
3020 	lock_extent(&BTRFS_I(inode)->io_tree, alloc_start, locked_end,  in btrfs_fallocate()
3023 	btrfs_assert_inode_range_clean(BTRFS_I(inode), alloc_start, locked_end);  in btrfs_fallocate()
3109 	unlock_extent(&BTRFS_I(inode)->io_tree, alloc_start, locked_end,  in btrfs_fallocate()