btrfs: factor out the main loop of btrfs_buffered_write() into a helper

Inside the main loop of btrfs_buffered_write() we are doing a lot of
heavy lifting inside a while() loop.

This makes it pretty hard to read, factor out the content into a helper,
copy_one_range() to do the work.

This has no functional change, but with some minor variable renames,
e.g. rename all "sector" into "block".

Reviewed-by: Johannes Thumshirn <[email protected]>
Reviewed-by: Filipe Manana <[email protected]>
Signed-off-by: Qu Wenruo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>

0 files changed, 0 insertions, 0 deletions