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

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To: Wang Wenhu <wenhu.wang@xxxxxxxxxxx>
Subject: Re: [PATCHv2 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Tue, 14 Jun 2022 23:43:43 -0700
Cc: gregkh@xxxxxxxxxxxxxxxxxxx, arnd@xxxxxxxx, hao.wu@xxxxxxxxx, trix@xxxxxxxxxx, mdf@xxxxxxxxxx, yilun.xu@xxxxxxxxx, bhelgaas@xxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, linux-fpga@xxxxxxxxxxxxxxx, linux-pci@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, christophe.leroy@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, mpe@xxxxxxxxxxxxxx
In-reply-to: <SG2PR01MB29513533A1EA32DCB00D10309FAD9@SG2PR01MB2951.apcprd01.prod.exchangelabs.com>
References: <YqHy1uXwCLlJmftr@kroah.com> <20220615055735.53585-1-wenhu.wang@hotmail.com> <SG2PR01MB29513533A1EA32DCB00D10309FAD9@SG2PR01MB2951.apcprd01.prod.exchangelabs.com>

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.

References:
- [PATCHv2 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation
  - From: Wang Wenhu

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