linux-kernel - Re: [PATCH 5/7] scsi: mac_scsi: Fix pseudo DMA implementation, take 2

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Message-ID: <247ed79a-75c7-41fd-0932-0b7701ee5d4e@gmail.com>
Date:   Tue, 4 Jun 2019 09:25:49 +1200
From:   Michael Schmitz <schmitzmic@...il.com>
To:     Finn Thain <fthain@...egraphics.com.au>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        scsi <linux-scsi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>
Subject: Re: [PATCH 5/7] scsi: mac_scsi: Fix pseudo DMA implementation, take 2

Hi Finn,

On 3/06/19 7:40 PM, Finn Thain wrote:
>
>> There are several other drivers that contain pieces of assembler code.
>>
> Does any driver contain assembler code for multiple architectures? I was
> trying to avoid that -- though admittedly I don't yet have actual code for
> the PDMA implementation for mac_scsi for Nubus PowerMacs.
>
I've seen that once, for one of the ESP drivers that were supported on 
both m68k and ppc (APUS, PPC upgrade to Amiga computers). But that 
driver was removed long ago (after 2.6?).

In that case, the assembly file did reside in drivers/scsi/. That still 
appears to be current practice (see drivers/scsi/arm/acornscsi-io.S).

Cheers,

     Michael