While trying to understand the checksum code I came across some oddities regarding map_private_extent_buffer() and it's interaction with csum_tree_block().
These patches address them but are either purely cosmetic or only add a comment documenting behaviour. Changes to v1: * Add Reviewed-by tags * Change wording of commit message in patch 3/3 Johannes Thumshirn (3): btrfs: don't initialize 'offset' in map_private_extent_buffer() btrfs: use offset_in_page for start_offset in map_private_extent_buffer() btrfs: document extent mapping assumptions in checksum fs/btrfs/disk-io.c | 6 ++++++ fs/btrfs/extent_io.c | 4 ++-- 2 files changed, 8 insertions(+), 2 deletions(-) -- 2.16.4