bytenr in btrfs_sector_sum is unnecessary, because the extents that
btrfs_sector_sum points to are continuous, we can find out the expected
checksums by btrfs_ordered_sum's bytenr and the offset, so we can
remove btrfs_sector_sum's bytenr.
After removing bytenr, we don't use the while loop to get
Quoting Miao Xie (2013-03-28 05:03:52)
bytenr in btrfs_sector_sum is unnecessary, because the extents that
btrfs_sector_sum points to are continuous, we can find out the expected
checksums by btrfs_ordered_sum's bytenr and the offset, so we can
remove btrfs_sector_sum's bytenr.
I really like
