linux-kernel - Re: [PATCH v4 11/13] blk-mq: Refactor and rename blk_mq_free_map_and

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Date:   Mon, 27 Sep 2021 10:40:28 +0100
From:   John Garry <john.garry@...wei.com>
To:     Ming Lei <ming.lei@...hat.com>
CC:     "axboe@...nel.dk" <axboe@...nel.dk>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "hare@...e.de" <hare@...e.de>
Subject: Re: [PATCH v4 11/13] blk-mq: Refactor and rename
 blk_mq_free_map_and_{requests->rqs}()

On 27/09/2021 10:19, Ming Lei wrote:
>> However, apart from this, I can change __blk_mq_free_map_and_rqs() to
>> NULLify set->tags[i], as it is always passed set->tags[i].
>>
>> Do you have a preference?
> I meant there are 5 following uses in your patch:
> 
> +                               blk_mq_free_map_and_rqs(set, set->tags[i], i);
> +                               set->tags[i] = NULL;
> 
> and one new helper(blk_mq_free_set_map_and_rqs(set, i)?) can be added for just
> doing that,

Ah, ok, but in the next patch we replace these blk_mq_free_map_and_rqs() 
calls with __blk_mq_free_map_and_rqs(), and __blk_mq_free_map_and_rqs() 
is always passed set->tags[i], so we do as you request there, i.e. 
NULLify set->tags[i] in __blk_mq_free_map_and_rqs().

Thanks,
John