linux-kernel - Re: [PATCH v2 5/5] zram: use generic PAGE_SECTORS and PAGE_SECTORS

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Message-ID: <597dab55-737f-73f1-3505-1e0c59d52d80@wdc.com>
Date:   Fri, 26 May 2023 09:24:14 +0000
From:   Johannes Thumshirn <Johannes.Thumshirn@....com>
To:     Luis Chamberlain <mcgrof@...nel.org>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "agk@...hat.com" <agk@...hat.com>,
        "snitzer@...nel.org" <snitzer@...nel.org>,
        "philipp.reisner@...bit.com" <philipp.reisner@...bit.com>,
        "lars.ellenberg@...bit.com" <lars.ellenberg@...bit.com>,
        "christoph.boehmwalder@...bit.com" <christoph.boehmwalder@...bit.com>,
        "hch@...radead.org" <hch@...radead.org>,
        "djwong@...nel.org" <djwong@...nel.org>,
        "minchan@...nel.org" <minchan@...nel.org>,
        "senozhatsky@...omium.org" <senozhatsky@...omium.org>
CC:     "patches@...ts.linux.dev" <patches@...ts.linux.dev>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-xfs@...r.kernel.org" <linux-xfs@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "dm-devel@...hat.com" <dm-devel@...hat.com>,
        "drbd-dev@...ts.linbit.com" <drbd-dev@...ts.linbit.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "willy@...radead.org" <willy@...radead.org>,
        "hare@...e.de" <hare@...e.de>,
        "p.raghav@...sung.com" <p.raghav@...sung.com>,
        "da.gomez@...sung.com" <da.gomez@...sung.com>,
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        "rpuri.linux@...il.com" <rpuri.linux@...il.com>,
        "kbusch@...nel.org" <kbusch@...nel.org>
Subject: Re: [PATCH v2 5/5] zram: use generic PAGE_SECTORS and
 PAGE_SECTORS_SHIFT

On 26.05.23 09:34, Luis Chamberlain wrote:
> +	u32 index = bio->bi_iter.bi_sector >> PAGE_SECTORS_SHIFT;
> +	u32 offset = (bio->bi_iter.bi_sector & (PAGE_SECTORS - 1)) <<
>  			SECTOR_SHIFT;

(PAGE_SECTORS - 1) is SECTOR_MASK, please use this.

Thanks,
	Johannes