Function sync_dirty_buffer

Ext4Fsd/linux.c:880–894

}

int sync_dirty_buffer(struct buffer_head *bh)
{
    int ret = 0;

    ASSERT(atomic_read(&bh->b_count) <= 1);
    lock_buffer(bh);
    if (test_clear_buffer_dirty(bh)) {
        get_bh(bh);
        ret = submit_bh(WRITE, bh);
        wait_on_buffer(bh);
    } else {
        unlock_buffer(bh);
    }
    return ret;
}

void mark_buffer_dirty(struct buffer_head *bh)
{