ext4_ext_extent_pblock
blk = ext4_ext_extent_pblock(ep);
ext4_ext_extent_pblock(&newex);
e4fs_daddr_t e_start = ext4_ext_extent_pblock(ex);
newblk = ext4_ext_extent_pblock(&newex);
start = ext4_ext_extent_pblock(ex) +
e4fs_daddr_t blk = ext4_ext_extent_pblock(ext);
static inline e4fs_daddr_t ext4_ext_extent_pblock(struct ext4_extent *);
e4fs_daddr_t pblk = ext4_ext_extent_pblock(ex);
if (ext4_ext_extent_pblock(ex1) + le16toh(ex1->e_len) ==
ext4_ext_extent_pblock(ex2))