Export functions that implement the current behavior done
for an inode in journal_submit|finish_inode_data_buffers().

No functional change.
Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/20201006004841.600488-2-mfo@canonical.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>