linux-kernel - Re: [PATCH 05/16] nvme: zns: Allow ZNS drives that have non-power_of

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Message-ID: <1e3afa38-0652-0a6a-045c-79a0b9c19f30@acm.org>
Date:   Tue, 3 May 2022 09:50:37 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Pankaj Raghav <p.raghav@...sung.com>, jaegeuk@...nel.org,
        axboe@...nel.dk, snitzer@...nel.org, hch@....de, mcgrof@...nel.org,
        naohiro.aota@....com, sagi@...mberg.me,
        damien.lemoal@...nsource.wdc.com, dsterba@...e.com,
        johannes.thumshirn@....com
Cc:     linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org,
        clm@...com, gost.dev@...sung.com, chao@...nel.org,
        linux-f2fs-devel@...ts.sourceforge.net, josef@...icpanda.com,
        jonathan.derrick@...ux.dev, agk@...hat.com, kbusch@...nel.org,
        kch@...dia.com, linux-nvme@...ts.infradead.org,
        dm-devel@...hat.com, jiangbo.365@...edance.com,
        linux-fsdevel@...r.kernel.org, matias.bjorling@....com,
        linux-block@...r.kernel.org
Subject: Re: [PATCH 05/16] nvme: zns: Allow ZNS drives that have
 non-power_of_2 zone size

On 4/27/22 09:02, Pankaj Raghav wrote:
> -	sector &= ~(ns->zsze - 1);
> +	sector = rounddown(sector, ns->zsze);

The above change breaks 32-bit builds since ns->zsze is 64 bits wide and 
since rounddown() uses the C division operator instead of div64_u64().

Thanks,

Bart.