ext4_freed_extents_can_be_merged
if (ext4_freed_extents_can_be_merged(prev, entry))
if (ext4_freed_extents_can_be_merged(entry, next))
if (ext4_freed_extents_can_be_merged(new_entry, entry)) {
if (ext4_freed_extents_can_be_merged(entry, new_entry)) {