linux-kernel - Re: [PATCHv2 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation

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Message-ID: <Yql/n+RuVttucWVf@infradead.org>
Date:   Tue, 14 Jun 2022 23:43:43 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Wang Wenhu <wenhu.wang@...mail.com>
Cc:     gregkh@...uxfoundation.org, arnd@...db.de, hao.wu@...el.com,
        trix@...hat.com, mdf@...nel.org, yilun.xu@...el.com,
        bhelgaas@...gle.com, akpm@...ux-foundation.org,
        linux-fpga@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-mm@...ck.org, christophe.leroy@...roup.eu,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        mpe@...erman.id.au
Subject: Re: [PATCHv2 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver
 implementation

As pointed out last time:  uio is the wrong interface to expose sram,
and any kind of ioremap is the wrong way to map it.