SUMMARY_SIZE
SUM_FOOTER_SIZE) / SUMMARY_SIZE;
(sbi->blocksize - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
offset += SUMMARY_SIZE;
if (offset + SUMMARY_SIZE <= sbi->blocksize -
written_size += SUMMARY_SIZE;
if (written_size + SUMMARY_SIZE <= sbi->blocksize -
sbi->sum_entry_size = SUMMARY_SIZE * sbi->entries_in_sum;