@@ -272,6 +275,7 @@ static struct cbt_info *do_cbt_alloc(struct request_queue 
*q, __u8 *name,
        if (!cbt)
                return ERR_PTR(-ENOMEM);
+ INIT_LIST_HEAD(&cbt->list);

This initialization is excess, it is only required for a list_head we add TO, the added list_head can be left uninitialized.

        cbt->block_bits = ilog2(blocksize);
        cbt->block_max  = DIV_ROUND_UP(size, blocksize);
        spin_lock_init(&cbt->lock);

--
Best regards, Tikhomirov Pavel
Senior Software Developer, Virtuozzo.

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