linux-kernel - RE: [PATCHv2] mmc: block: Add single read for 4k sector cards

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Message-ID: <3d9ff280c02042e58e406241599ce893@AcuMS.aculab.com>
Date:   Wed, 29 Jun 2022 08:41:37 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Adrian Hunter' <adrian.hunter@...el.com>,
        Christian Löhle <CLoehle@...erstone.com>,
        Avri Altman <Avri.Altman@....com>,
        "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCHv2] mmc: block: Add single read for 4k sector cards

...
> >> 			brq->data.blocks = queue_physical_block_size(req->q) >> SECTOR_SHIFT;
> >
> > Do we want to switch to SECTOR_SHIFT instead of 9? So far SECTOR_SHIFT is not used at all in mmc
> core.
> 
> I guess '9' is more consistent

You can just multiply/divide by 512u (probably SECTOR_SIZE).
(In some senses 512u is actually better!)
More obvious still and the compiler will generate a shift anyway.

	David

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