tux3: Use new dleaf2_write() for map_region2()

New dleaf2_write() doesn't require to read exists extents. So, now, we
can call btree_write() without btree_read() simply.

Note, this removes overwrite mode temporary. Later patch will adds new
overwrite mode.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
1 file changed