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Date:   Tue, 21 Jul 2020 17:13:13 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Maxim Levitsky <mlevitsk@redhat.com>
Cc:     linux-kernel@vger.kernel.org, Keith Busch <kbusch@kernel.org>,
        Josef Bacik <josef@toxicpanda.com>,
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        Damien Le Moal <damien.lemoal@wdc.com>,
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Subject: Re: [PATCH 01/10] block: introduce blk_is_valid_logical_block_size
Message-ID: <20200721151313.GA10620@lst.de>
References: <20200721105239.8270-1-mlevitsk@redhat.com> <20200721105239.8270-2-mlevitsk@redhat.com>
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> +/**
> + * blk_check_logical_block_size - check if logical block size is supported
> + * by the kernel
> + * @size:  the logical block size, in bytes
> + *
> + * Description:
> + *   This function checks if the block layers supports given block size
> + **/
> +bool blk_is_valid_logical_block_size(unsigned int size)
> +{
> +	return size >= SECTOR_SIZE && size <= PAGE_SIZE && !is_power_of_2(size);

Shouldn't this be a ... && is_power_of_2(size)?

>  	if (q->limits.io_min < q->limits.physical_block_size)
>  		q->limits.io_min = q->limits.physical_block_size;
> +
>  }

This adds a pointless empty line.

> +extern bool blk_is_valid_logical_block_size(unsigned int size);

No need for externs on function declarations.