linux-kernel - Re: [PATCH v2] pata_falcon: Avoid type warnings from sparse

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Message-ID: <6cbcabe8-029b-9c3d-a503-afe4293f9dbc@opensource.wdc.com>
Date:   Mon, 29 Nov 2021 20:38:30 +0900
From:   Damien Le Moal <damien.lemoal@...nsource.wdc.com>
To:     Finn Thain <fthain@...ux-m68k.org>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Michael Schmitz <schmitzmic@...il.com>,
        Jens Axboe <axboe@...nel.dk>, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] pata_falcon: Avoid type warnings from sparse

On 2021/11/26 7:34, Finn Thain wrote:
> The zero day bot reported some sparse complaints in pata_falcon.c. E.g.
> 
> drivers/ata/pata_falcon.c:58:41: warning: cast removes address space '__iomem' of expression
> drivers/ata/pata_falcon.c:58:41: warning: incorrect type in argument 1 (different address spaces)
> drivers/ata/pata_falcon.c:58:41:    expected unsigned short volatile [noderef] [usertype] __iomem *port
> drivers/ata/pata_falcon.c:58:41:    got unsigned short [usertype] *
> 
> The same thing shows up in 8 places, all told. Avoid this by removing
> unnecessary type casts.
> 
> Cc: Jens Axboe <axboe@...nel.dk>
> Cc: Michael Schmitz <schmitzmic@...il.com>
> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
> Reported-by: kernel test robot <lkp@...el.com>
> Suggested-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> Signed-off-by: Finn Thain <fthain@...ux-m68k.org>

Applied to for-5.16-fixes. Thanks.


-- 
Damien Le Moal
Western Digital Research